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.

01
of 04

Sourceforge

The number one place on the Web for Open Source projects in all three languages (and many more).
02
of 04

Neomem Personal Organizer

A secure C++ Personal Organizer. This is good enough to be a commercial product.
Fabulous designer of complex origami shapes. More »
A powerful dungeon generator for role playing games in C and C++ More »