We published some of our projects as open source:

Carballo Chess Engine

Is our chess engine used on the Mobialia Chess application:

https://github.com/albertoruibal/carballo

Mobialia Trivial Spain

Our game of questions and answers, source available at Google Code:

http://code.google.com/p/mobialia-trivial-es/

Mobialia Wikiplaces

This application shows on a map or on a list places from Wikipedia near your location:

http://code.google.com/p/mobialia-wikiplaces/

Social Media Demo

This application shows some social media integration demos.

http://code.google.com/p/mobialia-social-media-demo/

And we also participated on other open source projects:

LottoScan

A Spanish National Lottery checker using the barcode reader developed on an Android CodeSprint:

http://code.google.com/p/lottoscan/