BackupProject v.0.7 (FREE)

BackupProject - Unity Editor extension can backup your project by two ways: using manually function or choosing auto save interval. Extension available free for Windows and Mac users. This extension help you saving hours of work.

Features:

-Open source
-Support Mac and Windows
-Support Unity 4.0 or higher
-Easy to add or remove from project
-Can separate backup shaders, compute shaders of fbx files

AssetStore

FAQ Link

GitHub Link

New version BackupProject v.0.73 available on the Asset Store. Added option to ZIP the project folder (additional copy) and menu for customizing color of plugin

Please test my plugin on unity 4.5 and send screenshots if there is error, thanks in advance