This is a collection of the most popular and used sources in Cydia as of 8/7/16
To install, just place MasterRepo.list in /etc/apt/sources.list.d
If you encounter any problems, make sure permissions are set to 0655.
The latest release it is known to work on is Cydia 1.1.27, iOS 9.3.3 - however, this should work on virtually any release of Cydia, from iOS 2 to iOS 9. Unless Cydia changes the way it handles sources and list files, this file should not cause any problems.
Any other questions should be directed to /u/JonLuca on reddit, or through email at [email protected]