Posted here is a link to the profile page of Darrell Ulm for GitHub which has Open Source code in several languages such as C/C++/C#, PHP/MySQL, Assembly Language, and Unity3d.
Some projects include Unity3d/C# code for a grid based game of tile matching, some code for Koha ILS in PHP/MySQL, a game for Unity3d Tap the Object type App, a Data-Parallel Compiler Optimizer written in C, and a module for Drupal called Google Books which loads data into text fields.
GitHub is definitely a great resource for Open Source software development, software workflow, and software development in general and gets better year to year and it seems like almost everyone is using it is some way for some coded project.