GitHub: 49
Stack Overflow: 60
Description: Sapphire is an object-oriented PHP5 web framework designed to let you focus on your data and business logic.
Language: PHP
Framework Link: http://www.silverstripe.org/framework-introduction/
GitHub Link: https://github.com/silverstripe/silverstripe-framework
Stack Overflow Questions: http://stackoverflow.com/questions/tagged/silverstripe