Send Mail Get Mail - A postcard-sending website.
CMake - CMake is an open-source, cross-platform family of tools designed to build, test and package software.
Dollar A Day - Automatically donate $1 a day to featured nonprofits.
SCons - SCons is an Open Source software construction tool—that is, a next-generation build tool.
Ecosia - Ecosia is a green search engine that donates at least 80% of its profits from search ad revenue and...
Ninja Build - Ninja is a small build system with a focus on speed.