DarkPatcher is a library for creating patches for Unity game. It can be used to create a launcher which keeps data of your game updated.
It works on Windows, Linux and Mac OSX and does not require Unity Pro license. It offers an easy way to create a launcher as Unity application.
Also, patch creation becomes even easier than it was - after selecting versions of your game everything else is done by our library.
This project is no longer available via Unity Asset Store. If you are still interested in getting this plugin check out PatchKit - Games Distribution Network based on DarkPatcher plugin.