I found an old project that we participated in almost two years ago, called DES.
http://albin.abo.fi/~ernylund/des.html
In a course called Cryptography and Network Security we're trying to break an encryption algorithm called DES (short for Data Encryption Standard), by doing a brute force search of the complete keyspace until we find the right key.
The project finished a long time already. Here's the stats page, we finished in 5th out of 9 teams.
http://desstats.daychanged.com/

Ototero, could you add this one more to the retired projects? It complements our Team history!