diff --git a/data/registry/otel-odddotnet.yml b/data/registry/otel-odddotnet.yml
new file mode 100644
index 000000000000..1f223f07fc16
--- /dev/null
+++ b/data/registry/otel-odddotnet.yml
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+# cSpell:ignore Kenna odddotnet
+title: 'OddDotNet: Test Harness for OpenTelemetry'
+registryType: utilities
+language: collector
+tags:
+  - proto
+  - protobuf
+  - testing
+  - odd
+  - observability
+  - collector
+  - test-harness
+  - odddotnet
+urls:
+  repo: https://github.com/OddDotNet/OddDotNet
+  docs: https://odddotnet.github.io/OddDotDocs/
+license: Apache 2.0
+description: OddDotNet is a Test Harness for OpenTelemetry that works for any
+  language, built in .NET. It is a container image that accepts OpenTelemetry
+  signals over gRPC, and it includes a query language for verifying and
+  validating those signals.
+
+  OddDotNet enables automated Observability Driven Development, hence where it
+  gets its name.
+authors:
+  - name: Tyler Kenna
+    email: odddotnet@gmail.com
+    url: https://github.com/DoubleTK
+createdAt: '2024-11-08'
diff --git a/data/registry/tools-odddotnet-client-dotnet.yml b/data/registry/tools-odddotnet-client-dotnet.yml
new file mode 100644
index 000000000000..310137c19cc2
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+++ b/data/registry/tools-odddotnet-client-dotnet.yml
@@ -0,0 +1,39 @@
+# cSpell:ignore Kenna odddotnet
+title: OddDotNet Client for .NET
+registryType: utilities
+language: dotnet
+tags:
+  - odddotnet
+  - dotnet
+  - c#
+  - testing
+  - odd
+  - observability
+  - test-harness
+urls:
+  repo: https://github.com/OddDotNet/OddDotCSharp
+  docs: https://odddotnet.github.io/OddDotDocs/
+license: Apache 2.0
+description: OddDotNet is an Test Harness for OpenTelemetry that works for any
+  language, built in .NET. It is a container image that accepts OpenTelemetry
+  signals over gRPC, and it includes a query language for verifying and
+  validating those signals.
+
+  While it's possible to generate your own client using the proto files, it is
+  often more convenient to use a pre-compiled package installed from NuGet. This
+  client library for .NET also includes the opentelemetry-proto clients to allow
+  for manually generating and sending signals, and lastly it includes a query
+  builder to ease the process of building queries using the OddQueryLanguage
+  (OQL).
+
+  The proto files that this project depends on can be found at
+  https://github.com/OddDotNet/OddDotProto.
+authors:
+  - name: Tyler Kenna
+    email: odddotnet@gmail.com
+    url: https://github.com/DoubleTK
+createdAt: '2024-11-08'
+package:
+  name: OddDotNet.Client
+  registry: nuget
+  version: 0.2.1