Adding Zentral

Adding Zentral to  All in one Tools

README.md

@@ -46,6 +46,7 @@ A curated list of tools and resources for security incident response, aimed to h
 * [Redline](https://www.fireeye.com/services/freeware/redline.html) - provides host investigative capabilities to users to find signs of malicious activity through memory and file analysis, and the development of a threat assessment profile
 * [The Sleuth Kit & Autopsy](http://www.sleuthkit.org) - The Sleuth Kit is a Unix and Windows based tool which helps in forensic analysis of computers. It comes with various tools which helps in digital forensics. These tools help in analyzing disk images, performing in-depth analysis of file systems, and various other things
 * [X-Ways Forensics](http://www.x-ways.net/forensics/) - X-Ways is a forensics tool for Disk cloning and imaging. It can be used to find deleted files and disk analysis
+* [Zentral](https://github.com/zentralopensource/zentral) - combines osquery's powerful endpoint inventory features with a flexible notification and action framework. This enables one to identify and react to changes on OS X and Linux clients.
 
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