[manlio]

Contributing with what I bookmarked so far:

* Watsi - https://watsi.org/ - A nonprofit healthcare crowdsourcing platform

* Akvo - http://akvo.org - Akvo builds open source internet and mobile software which is designed to support international development partnership networks, and make cooperation and aid activity more effective and transparent

* DuckDuck Go - https://duck.co/ - Delivering a world-class search engine with great results and great privacy and with open-source instant answers at its core

* Electronic Froniter Foundation https://www.eff.org/

* Greenpeace - http://www.greenpeace.org/

* A bit meta, but good for inspiration: http://www.nonprofittechforgood.com/