Pretty much a fully featured console calculator. One of the few that makes it easy to use logic operations and different bases. Find out more in the README.
BPasswd is a strong password generator. It derives passwords from a master password and a usage-specific “salt”. Since BPasswd is aimed at the web, the “salt” is usually something site-specific such as “github”, “amazon”, “google”, etc. In other words, you get to reuse one (or a handful) of passwords, but end up with a unique password for each site. Best of all is that you don’t need to carry around some key file or trust a third-party service like you’d do with a password manager. Find out more on this page.
tcplay is a free (BSD-licensed), pretty much fully featured (including multiple keyfiles, cipher cascades, etc) and stable TrueCrypt implementation. Find out more in the README.
There’s also a start of a bootloader for it here. It’s incomplete, so doesn’t actually do anything useful, but, if nothing else, serves as a small example of how to write an x86 bootloader.