Some projects I have submitted patches to (see my Ohloh profile for the whole list):
NLTK, the Natural Language Toolkit. Contributed a proper implementation of masi_distance per Passonneau (2006).
RapidFTR---Android, the android App for Rapid Family Tracing and Reunification system Contributed a Spanish translation (pending).
AAC-Speech-Android, an alternative communication (AAC) icon-sequence-to-speech app for children with speech disabilities. Contributed fixes to the prepositional phrases generation subsystem.
Antfarm, referring expression generation for dictionary definitions. Contributed the basis for a Spanish version.
Quepy, a python framework to transform natural language questions to queries in a database query language. Contributed by fixing the grammar for time-related questions.
Apparatus, a collection of low-level machine learning algorithms for node.js. Added support for sparse observations and configurable additive smoothing.
TorChat2, a decentralized anonymous instant messenger on top of Tor Hidden Services. Added support for using an external tor instance (pending).
DuckDuckHack Goodie Instant Answers for DuckDuckGo search engine. Contributed to the Sudoku Instant Answer Goodie.
Twidge, a Haskell commandline Twitter client. Added support for in reply to.
Eclipse, an open development platform. A Un*x manpage.
Debian package for reinteract, a worksheet-based graphical Python shell. Menu entry and application icon.
mharc, a mailing list archiver, written in Perl. Spanish translation (pending).