nxcc is a tiny C-like script compiler and virtual machine. It supports classes, can easily be embedded, and is not memory safe or type safe.
FuckTheNSA is a binary-to-text encoding and decoding tool. The encoded data is an ASCII-string, 8 times bigger than the source data, and consists purely of anti-NSA profanity. It encodes any 8-bit byte sequences.
A backup software system.
A query processing engine that defends against inference problems.