Awesome

snippetsLibrary for blender 2.79

Blender addon - personnal snippets library in text editor

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Looking for the blender 2.8 version ? Go to this repository

Demo Youtube

Panel in the text editor's toolbar
Shipped with a personal pack of usefull code snippets (once installed just click the reload button in the addon UI)

Works well in combination with devTools to make your scripting life easier