This is my repository of tools which i use.
Blender:
MifthTools - many tools which i use every day. Cloning, Animation. http://blenderartists.org/forum/showthread.php?346588-MifthTools-Addon
SuperGrouper - Simple Grouping System. Forget about 20 layers limitation. http://blenderartists.org/forum/showthread.php?360257-Super-Grouper-WIP
Simple3DCoat Applink - Applink for Blender/3DCoat integration. http://3d-coat.com/forum/index.php?showtopic=15481
You can donate some money if you like these tools https://inspirepay.com/pay/mifth/$3
Thanks.