I would like to introduce you AndroidLibs.
AndroidLibs is a library list for android developers. There are plenty of other sites like this (Android-Arsenal),
but they all have a worse design and aren't very useful.
- Custom URLs to documentation, extern sites
- Additional metadata, e.G.: GitHub update/commit dates, required API level, library version, list / view
- User ratings and comments
Feel free to submit / suggest a library for AndroidLibs! I also would appreciate any feedback or feature requests.