diff --git a/CHANGELOG.md b/CHANGELOG.md
index 738fc2b5..1648356f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 For a list of breaking changes, check [here](#breaking-changes).
 
+## 0.3.x
+
+- Add initial features support with datascript and datascript-transit
+- Include `cognitect.transit` as built-in dependency
+- Add `clojure.pprint/print-table`
+
 ## 0.3.4
 
 - Don't load modules more than once
diff --git a/bb.edn b/bb.edn
index b218752c..050446b6 100644
--- a/bb.edn
+++ b/bb.edn
@@ -2,20 +2,47 @@
  :tasks
  {:requires ([babashka.fs :as fs]
              [cheshire.core :as json]
+             [clojure.edn :as edn]
+             [clojure.pprint :as pp]
              [clojure.string :as str])
 
-  :init (do (def ^:dynamic *test* (= "true" (System/getenv "NBB_TESTS")))
-            (def windows? (-> (System/getProperty "os.name")
-                              str/lower-case
-                              (str/starts-with? "win")))
-            (when *test* (println "Tests are enabled.."))
-            (defn wrap-cmd [cmd]
-              (let [cmd (if *test*
-                          (str (str/replace cmd
-                                            "-M" "-M:test")
-                               " --config-merge shadow-tests.edn")
-                          cmd)]
+  :init (do
+          (def ^:dynamic *test* (= "true" (System/getenv "NBB_TESTS")))
+          (def windows? (-> (System/getProperty "os.name")
+                            str/lower-case
+                            (str/starts-with? "win")))
+          (def features (some-> (System/getenv "NBB_FEATURES")
+                                (str/split (re-pattern ","))))
+          (when *test* (println "Tests are enabled.."))
+          (defn wrap-cmd [cmd]
+            (let [cmd (if features
+                        (format "-Sdeps '%s' %s"
+                                {:deps
+                                 (into {}
+                                       (map (fn [f]
+                                              [(symbol (str f "/deps"))
+                                               {:local/root (str "features/" f)}])
+                                            features))}
+                                cmd)
+                        cmd)
+                  cmd (if *test*
+                        (str (str/replace cmd
+                                          "-M" "-M:test")
+                             " --config-merge shadow-tests.edn")
+                        cmd)]
+              (if features
+                (apply str cmd
+                  (map (fn [f] (format " --config-merge features/%s/shadow-cljs.edn" f))
+                       features))
                 cmd)))
+          ;; Build requires map for nbb to require feature namespaces
+          (when features
+            (let [m (->> (fs/glob "features" "**/nbb_features.edn")
+                         (mapcat (comp edn/read-string slurp str) )
+                         (mapcat (fn [{:keys [namespaces js]}]
+                                   (mapv (fn [n] [n js]) namespaces)))
+                         (into {}))]
+              (spit "src/nbb/feature-requires.edn" (with-out-str (pp/pprint m))))))
   clean (fs/delete-tree "lib")
 
   compile (clojure (wrap-cmd "-M -m shadow.cljs.devtools.cli --force-spawn compile modules"))
diff --git a/deps.edn b/deps.edn
index c486a780..bf565c82 100644
--- a/deps.edn
+++ b/deps.edn
@@ -19,4 +19,5 @@
         org.babashka/sci-configs
         {:git/url "https://github.com/babashka/sci-configs"
          :git/sha "d197da2413bd8e4e5c43159620ddfe4286c731ba"}
-        org.clojure/tools.cli {:mvn/version "1.0.206"}}}
+        org.clojure/tools.cli {:mvn/version "1.0.206"}
+        com.cognitect/transit-cljs {:mvn/version "0.8.269"}}}
diff --git a/doc/api.md b/doc/api.md
index c86b4aea..8fcafa8e 100644
--- a/doc/api.md
+++ b/doc/api.md
@@ -59,3 +59,9 @@ See [js-interop docs](https://github.com/applied-science/js-interop).
 ### clojure.tools.cli
 
 - `format-lines`, `summarize`, `get-default-options`, `parse-opts`, `make-summary-part`
+
+## transit-cljs
+
+### cognitect.transit
+
+- `write`, `writer`, `write-handler`, `write-meta`, `read`, `read`, `read-handler`, `tagged-value`
diff --git a/doc/dev.md b/doc/dev.md
index d3189d0f..3f47f12b 100644
--- a/doc/dev.md
+++ b/doc/dev.md
@@ -48,3 +48,16 @@ Then run `node out/nbb_main.js <args>` to test the compiled nbb.
 ## Test
 
 To run tests, run `bb run-tests` for unit tests and `bb run-integration-tests` for running integration tests.
+
+## Features
+
+`nbb` can optionally bundle additional Clojure(Script) libraries as features. These can be specified with `$NBB_FEATURES` to compilation tasks e.g. `NBB_FEATURES=datascript,datascript-transit bb release`. The following features are provided:
+
+* [datascript](https://github.com/tonsky/datascript)
+* [datascript-transit](https://github.com/tonsky/datascript-transit)
+
+To add a new feature, add the following under `features/$LIBRARY/`:
+- `deps.edn` - Dependencies for library
+- `shadow-cljs.edn` - Compiler options to build library in advanced/release mode
+- `src/nbb/impl/$LIBRARY.cljs` - Sci mappings
+- `src/nbb_features.edn` - Configuration to map namespaces to js assets
diff --git a/features/datascript-transit/deps.edn b/features/datascript-transit/deps.edn
new file mode 100644
index 00000000..2412f0ac
--- /dev/null
+++ b/features/datascript-transit/deps.edn
@@ -0,0 +1,2 @@
+{:deps
+ {datascript-transit/datascript-transit {:mvn/version "0.3.0"}}}
diff --git a/features/datascript-transit/shadow-cljs.edn b/features/datascript-transit/shadow-cljs.edn
new file mode 100644
index 00000000..01fe58f8
--- /dev/null
+++ b/features/datascript-transit/shadow-cljs.edn
@@ -0,0 +1,3 @@
+{:modules
+ {:nbb_datascript_transit {:init-fn nbb.impl.datascript-transit/init
+                           :depends-on #{:nbb_core :nbb_datascript :nbb_transit}}}}
diff --git a/features/datascript-transit/src/nbb/impl/datascript_transit.cljs b/features/datascript-transit/src/nbb/impl/datascript_transit.cljs
new file mode 100644
index 00000000..2759e996
--- /dev/null
+++ b/features/datascript-transit/src/nbb/impl/datascript_transit.cljs
@@ -0,0 +1,18 @@
+(ns nbb.impl.datascript-transit
+  {:no-doc true}
+  (:require [datascript.transit :as dt]
+            [nbb.core :as nbb]
+            [sci.core :as sci :refer [copy-var]]))
+
+(def transit-ns (sci/create-ns 'datascript.transit nil))
+
+(def transit-namespace
+  {'read-handlers (copy-var dt/read-handlers transit-ns)
+   'write-handlers (copy-var dt/write-handlers transit-ns)
+   'read-transit-str (copy-var dt/read-transit-str transit-ns)
+   'write-transit-str (copy-var dt/write-transit-str transit-ns)})
+
+(defn init []
+  (nbb/register-plugin!
+   ::datascript-transit
+   {:namespaces {'datascript.transit transit-namespace}}))
diff --git a/features/datascript-transit/src/nbb_features.edn b/features/datascript-transit/src/nbb_features.edn
new file mode 100644
index 00000000..890ab900
--- /dev/null
+++ b/features/datascript-transit/src/nbb_features.edn
@@ -0,0 +1,3 @@
+[{:name logseq/datascript-transit
+  :namespaces [datascript.transit]
+  :js "./nbb_datascript_transit.js"}]
diff --git a/features/datascript/deps.edn b/features/datascript/deps.edn
new file mode 100644
index 00000000..ac545d01
--- /dev/null
+++ b/features/datascript/deps.edn
@@ -0,0 +1,2 @@
+{:deps
+ {datascript/datascript {:mvn/version "1.3.12"}}}
diff --git a/features/datascript/shadow-cljs.edn b/features/datascript/shadow-cljs.edn
new file mode 100644
index 00000000..7d9c996a
--- /dev/null
+++ b/features/datascript/shadow-cljs.edn
@@ -0,0 +1,6 @@
+{:compiler-options {:externs ["datascript/externs.js"]}
+ :modules
+ {:nbb_datascript {:init-fn nbb.impl.datascript/init
+                   ;; From https://github.com/tonsky/datascript/issues/298#issuecomment-813790783
+                   :prepend "if (global) { global.datascript = datascript } else if (window) { window.datascript = datascript } else { var datascript = {}}"
+                   :depends-on #{:nbb_core}}}}
diff --git a/features/datascript/src/nbb/impl/datascript.cljs b/features/datascript/src/nbb/impl/datascript.cljs
new file mode 100644
index 00000000..44ecd620
--- /dev/null
+++ b/features/datascript/src/nbb/impl/datascript.cljs
@@ -0,0 +1,49 @@
+(ns nbb.impl.datascript
+  {:no-doc true}
+  (:require [datascript.core :as d]
+            [datascript.db :as db]
+            [nbb.core :as nbb]
+            [sci.core :as sci :refer [copy-var]]))
+
+(def core-ns (sci/create-ns 'datascript.core nil))
+(def db-ns   (sci/create-ns 'datascript.db nil))
+
+(def core-namespace
+  {'q (copy-var d/q core-ns)
+   'empty-db (copy-var d/empty-db core-ns)
+   'db-with (copy-var d/db-with core-ns)
+   'filter (copy-var d/filter core-ns)
+   'init-db (copy-var d/init-db core-ns)
+   'datom (copy-var d/datom core-ns)
+   'datoms (copy-var d/datoms core-ns)
+   'pull (copy-var d/pull core-ns)
+   'pull-many (copy-var d/pull-many core-ns)
+   'entity (copy-var d/entity core-ns)
+   'tx0 (copy-var d/tx0 core-ns)
+   'db (copy-var d/db core-ns)
+   'with (copy-var d/with core-ns)
+   'touch (copy-var d/touch core-ns)
+   'index-range (copy-var d/index-range core-ns)
+   'listen! (copy-var d/listen! core-ns)
+   'conn-from-db (copy-var d/conn-from-db core-ns)
+   'conn-from-datoms (copy-var d/conn-from-datoms core-ns)
+   'transact! (copy-var d/transact! core-ns)
+   'create-conn (copy-var d/create-conn core-ns)
+   'reset-conn! (copy-var d/reset-conn! core-ns)
+   'from-serializable (copy-var d/from-serializable core-ns)
+   'serializable (copy-var d/serializable core-ns)})
+
+(def db-namespace
+  {'db-from-reader    (copy-var db/db-from-reader db-ns)
+   'datom-from-reader (copy-var db/datom-from-reader db-ns)
+   'datom-added       (copy-var db/datom-added db-ns)
+   'datom-tx          (copy-var db/datom-tx db-ns)
+   'datom             (copy-var db/datom db-ns)
+   'DB                (copy-var db/DB db-ns)
+   'Datom             (copy-var db/Datom db-ns)})
+
+(defn init []
+  (nbb/register-plugin!
+   ::datascript
+   {:namespaces {'datascript.core core-namespace
+                 'datascript.db   db-namespace}}))
diff --git a/features/datascript/src/nbb_features.edn b/features/datascript/src/nbb_features.edn
new file mode 100644
index 00000000..68a9ed9b
--- /dev/null
+++ b/features/datascript/src/nbb_features.edn
@@ -0,0 +1,3 @@
+[{:name logseq/datascript
+  :namespaces [datascript.core datascript.db]
+  :js "./nbb_datascript.js"}]
diff --git a/script/nbb_tests.clj b/script/nbb_tests.clj
index 4657dcaf..98321e3e 100644
--- a/script/nbb_tests.clj
+++ b/script/nbb_tests.clj
@@ -103,11 +103,15 @@
                 "(require '[honey.sql :as sql]) (sql/format {:select :foo :from :bar :where [:= :baz 2]})")))))
 
 (deftest pprint-test
-  (is (= (str "(0 1 2 3 4 5 6 7 8 9)\n")
-         (nbb "-e" "(require '[cljs.pprint :as pp]) (with-out-str (pp/pprint (range 10)))")))
+  (testing "pprint"
+    (is (= (str "(0 1 2 3 4 5 6 7 8 9)\n")
+          (nbb "-e" "(require '[cljs.pprint :as pp]) (with-out-str (pp/pprint (range 10)))"))))
   (testing "cljs.pprint = clojure.pprint"
     (is (= (str "(0 1 2 3 4 5 6 7 8 9)\n")
-           (nbb "-e" "(require '[clojure.pprint :as pp]) (with-out-str (pp/pprint (range 10)))")))))
+           (nbb "-e" "(require '[clojure.pprint :as pp]) (with-out-str (pp/pprint (range 10)))"))))
+  (testing "print-table"
+    (is (= "\n| :a |\n|----|\n|  1 |\n|  2 |\n"
+           (nbb* "-e" "(require '[clojure.pprint :as pp]) (do (pp/print-table [{:a 1} {:a 2}]))")))))
 
 (deftest api-test
   (tasks/shell {:dir "test-scripts/api-test"} (npm "install"))
@@ -161,6 +165,10 @@
   (is (= expected-cljs-bean-output
          (normalize-interop-output (nbb* "examples/cljs-bean/example.cljs")))))
 
+(deftest transit-test
+  (is (= {:fruits [:apple :banana :pear]}
+         (nbb "test-scripts/transit.cljs" (pr-str {:fruits [:apple :banana :pear]})))))
+
 (deftest error-test
   (let [err (-> (process ["node" "lib/nbb_main.js" "test-scripts/error.cljs"]
                          {:out :string
diff --git a/shadow-cljs.edn b/shadow-cljs.edn
index 045bd088..fb5f4f7a 100644
--- a/shadow-cljs.edn
+++ b/shadow-cljs.edn
@@ -40,6 +40,8 @@
                  :depends-on #{:nbb_core}}
     :nbb_tools_cli {:init-fn nbb.impl.tools-cli/init
                     :depends-on #{:nbb_core :nbb_goog_string}}
+    :nbb_transit {:init-fn nbb.impl.transit/init
+                  :depends-on #{:nbb_core}}
     :nbb_nrepl_server {:init-fn nbb.impl.nrepl-server/init
                        :depends-on #{:nbb_core :nbb_api}}
     :nbb_repl {:init-fn nbb.impl.repl/init
diff --git a/src/nbb/core.cljs b/src/nbb/core.cljs
index 793b327b..6de859f0 100644
--- a/src/nbb/core.cljs
+++ b/src/nbb/core.cljs
@@ -5,11 +5,13 @@
    ["path" :as path]
    ["url" :as url]
    [clojure.string :as str]
+   [clojure.edn :as edn]
    [goog.object :as gobj]
    [nbb.classpath :as cp]
    [nbb.common :refer [core-ns]]
    [sci.core :as sci]
    [sci.impl.vars :as vars]
+   [shadow.resource :as resource]
    [shadow.esm :as esm])
   (:require-macros [nbb.macros
                     :as macros
@@ -105,6 +107,14 @@
 
 (declare old-require)
 
+(defn- get-feature-requires
+  []
+  (edn/read-string (resource/inline "nbb/feature-requires.edn")))
+
+;; Lazily build map once to not effect initial load time
+(def feature-requires
+  (memoize get-feature-requires))
+
 (defn ^:private handle-libspecs [libspecs]
   (if (seq libspecs)
     (let [fst (first libspecs)
@@ -120,7 +130,7 @@
           current-ns (symbol current-ns-str)]
       (if as-alias
         (do (old-require fst)
-            (handle-libspecs (next libspecs)))
+          (handle-libspecs (next libspecs)))
         (case libname
           ;; built-ins
           (reagent.core)
@@ -159,7 +169,12 @@
           (load-module "./nbb_tools_cli.js" libname as refer rename libspecs)
           (goog.string goog.string.format)
           (load-module "./nbb_goog_string.js" libname as refer rename libspecs)
-          (if (string? libname)
+          (cognitect.transit)
+          (load-module "./nbb_transit.js" libname as refer rename libspecs)
+          (cond
+            (get (feature-requires) libname)
+            (load-module (get (feature-requires) libname) libname as refer rename libspecs)
+            (string? libname)
             ;; TODO: parse properties
             (let [[libname properties] (str/split libname #"\$" 2)
                   properties (when properties (.split properties "."))
@@ -199,11 +214,12 @@
                                        mod))))))]
               (-> mod
                   (.then after-load)))
+            :else
             ;; assume symbol
             (if (sci/eval-form @sci-ctx (list 'clojure.core/find-ns (list 'quote libname)))
               ;; built-in namespace
               (do (old-require fst)
-                  (handle-libspecs (next libspecs)))
+                (handle-libspecs (next libspecs)))
               (let [file (str/replace (str munged) #"\." "/")
                     files [(str file ".cljs") (str file ".cljc")]
                     dirs @cp/classpath-entries
@@ -234,16 +250,16 @@
                   (if-let [clazz (get-in @sci-ctx [:class->opts libname :class])]
                     (do (when as
                           (swap! (:env @sci-ctx) assoc-in [:namespaces current-ns :imports as] libname))
-                        (doseq [field refer]
-                          (let [mod-field (gobj/get clazz (str field))
-                                internal-subname (str current-ns "$" munged "$" field)]
-                            (swap! sci-ctx sci/merge-opts {:classes {internal-subname mod-field}})
-                            ;; Repeat hack from above
-                            (let [field (get rename field field)]
-                              (swap! (:env @sci-ctx)
-                                     assoc-in
-                                     [:namespaces current-ns :imports field] internal-subname))))
-                        (handle-libspecs (next libspecs)))
+                      (doseq [field refer]
+                        (let [mod-field (gobj/get clazz (str field))
+                              internal-subname (str current-ns "$" munged "$" field)]
+                          (swap! sci-ctx sci/merge-opts {:classes {internal-subname mod-field}})
+                          ;; Repeat hack from above
+                          (let [field (get rename field field)]
+                            (swap! (:env @sci-ctx)
+                                   assoc-in
+                                   [:namespaces current-ns :imports field] internal-subname))))
+                      (handle-libspecs (next libspecs)))
                     (js/Promise.reject (js/Error. (str "Could not find namespace: " libname)))))))))))
     (js/Promise.resolve @sci/ns)))
 
@@ -399,7 +415,8 @@
                                       'array (sci/copy-var array core-ns)
                                       'tap> (sci/copy-var tap> core-ns)
                                       'add-tap (sci/copy-var add-tap core-ns)
-                                      'remove-tap (sci/copy-var remove-tap core-ns)}
+                                      'remove-tap (sci/copy-var remove-tap core-ns)
+                                      'uuid (sci/copy-var uuid core-ns)}
 
                        'clojure.main {'repl-requires (sci/copy-var
                                                       repl-requires
@@ -421,6 +438,7 @@
                                       :set gobj/set
                                       :getKeys gobj/getKeys
                                       :getValueByKeys gobj/getValueByKeys}
+                    'ExceptionInfo js/Error
                     'Math js/Math}
           :disable-arity-checks true}))
 
diff --git a/src/nbb/feature-requires.edn b/src/nbb/feature-requires.edn
new file mode 100644
index 00000000..1be5aa9f
--- /dev/null
+++ b/src/nbb/feature-requires.edn
@@ -0,0 +1,2 @@
+;; This is a stub file which is only populated when nbb is built with features
+{}
diff --git a/src/nbb/impl/transit.cljs b/src/nbb/impl/transit.cljs
new file mode 100644
index 00000000..67eb734b
--- /dev/null
+++ b/src/nbb/impl/transit.cljs
@@ -0,0 +1,22 @@
+(ns nbb.impl.transit
+  (:require [cognitect.transit :as transit]
+            [nbb.core :as nbb]
+            [sci.core :as sci :refer [copy-var]]))
+
+(def transit-ns (sci/create-ns 'cognitect.transit nil))
+
+(def transit-namespace
+  {'write (copy-var transit/write transit-ns)
+   'writer (copy-var transit/writer transit-ns)
+   'write-handler (copy-var transit/write-handler transit-ns)
+   'write-meta (copy-var transit/write-meta transit-ns)
+   'read (copy-var transit/read transit-ns)
+   'reader (copy-var transit/reader transit-ns)
+   'read-handler (copy-var transit/read-handler transit-ns)
+   'tagged-value (copy-var transit/tagged-value transit-ns)
+   'ListHandler (copy-var transit/ListHandler transit-ns)})
+
+(defn init []
+  (nbb/register-plugin!
+   ::transit
+   {:namespaces {'cognitect.transit transit-namespace}}))
diff --git a/src/nbb/pprint.cljs b/src/nbb/pprint.cljs
index 31a7a17d..07529b53 100644
--- a/src/nbb/pprint.cljs
+++ b/src/nbb/pprint.cljs
@@ -9,13 +9,15 @@
   (binding [*print-fn* @sci/print-fn]
     (apply pp/pprint args)))
 
+(defn print-table [& args]
+  (binding [*print-fn* @sci/print-fn]
+    (apply pp/print-table args)))
+
 (def pprint-namespace
-  {'pprint (sci/copy-var pprint pns)})
+  {'pprint (sci/copy-var pprint pns)
+   'print-table (sci/copy-var print-table pns)})
 
 (defn init []
   (nbb/register-plugin!
    ::pprint
    {:namespaces {'cljs.pprint pprint-namespace}}))
-
-
-
diff --git a/test-scripts/transit.cljs b/test-scripts/transit.cljs
new file mode 100644
index 00000000..066e5ef5
--- /dev/null
+++ b/test-scripts/transit.cljs
@@ -0,0 +1,10 @@
+(ns transit
+  (:require [cognitect.transit :as t]
+            [clojure.edn :as edn]))
+
+(defn roundtrip [x]
+  (let [w (t/writer :json)
+        r (t/reader :json)]
+    (t/read r (t/write w x))))
+
+(prn (roundtrip (edn/read-string (first *command-line-args*))))