Top Open Source Projects in C / C++/ C#

Out of all the Open Source projects I've added these are my favorites so far. If I find better ones, I'll add those in.

1
Sourceforge

The number one place on the Web for Open Source projects in all three languages (and many more).

2
Neomem Personal Organizer

A secure C++ Personal Organizer. This is good enough to be a commercial product.

3
Origami Designer

Fabulous designer of complex origami shapes.

4
Open Source Dungeon Generator

A powerful dungeon generator for role playing games in C and C++