ExtendScripts, Adobe's JavaScript for the Creative Suite, automate and expand what is creatively possible within the Creative Suite. This collection comes from Dr. Woohoo!
To get a copy of the repository you can download the source from http://github.com/drwoohoo/ExtendScripts_AI or, alternatively, you can use git clone:
git clone git://github.com/drwoohoo/ExtendScripts_AI.git
Copy the Dr Woohoo folder into the Adobe Illustrator/Presets/Scripts folder, restart Illustrator if it's open and the script will appear in the File > Scripts submenu. Depending on what version of Illustrator you have, the Scripts folder might be located within a localized folder, e.g., en_US/Scripts.
You will find that most of these scripts were created for handling a specific challenge at the time. If you would like to extend them yourself, you can via Adobe's ExtendScript Toolkit, which is included with all installations of the Creative Suite. More info on ExtendScript Toolkit here: http://www.adobe.com/devnet/scripting.html
No promises, but feel free to log bug reports and issues to the ExtendScript_AI Github page: https://github.com/drwoohoo/ExtendScript_AI/issues