I'm working on a short product(license) key generation and validation framework for Mac OS X based on elliptic curve digital signatures. The goal is to write a replacement for AquanticPrime (which uses long RSA signatures). It's based on OpenSSL.

Code: http://github.com/dchest/ellipticlicense/tree/master currently in pre-alpha stage.

Would love to get code/security review!

Also I recently wrote a very simple Bayesian classificator for spam in Python: http://github.com/dchest/pybayesantispam/tree/master