You could look at e.g. https://github.com/languages/C https://github.com/languages/C and http://sourceforge.net/directory/language:c/freshness:recently-updated/

You could look at e.g. https://github.com/languages/C https://github.com/languages/C and http://sourceforge.net/directory/language:c/freshness:recently-updated/ http://sourceforge.net/directory/language:c/freshness:recent.... Interesting projects could include Linux/PostgreSQL (current) and Redis (pretty new); I tend to steer clear of unmaintained software, so I cannot help you there.