Stars
Attempted recreation Jeff Elman's work entitled "Finding Structure in Time" using Matlab's Neural Network Toolbox (paper at https://crl.ucsd.edu/~elman/Papers/fsit.pdf)
Ruby library for interfacing with FANN (Fast Artificial Neural Network)
A library for implementing simple genetic algorithms.
Backend implementation of OpenFridge with Ruby on Rails via Heroku.
The best Rails 3 and Rails 4 forum engine. Ever.