SharpPrivacy has been developed to be an Open Source implementation of the OpenPGP standard. OpenPGP is a standard for encrypting, decrypting, signing and verifying data cryptographically. The OpenPGP protocoll is commonly used and is said to be very secure.
FreeBREW is a collection of open source software for BREW. BREW Foundation Framework provides a multitasking-aware kernel which supports a layered, per-task and per-state event dispatching mechanism to enable robust, state-pattern programming in BREW