Duolingo is a language-learning and translation platform. It is also used as a crowdsourcing for web pages and documents translation.

"TABBY is an open source framework for vehicles" TABBY is the first open source framework for the creation vehicles. It has been defined as the “Ikea Car” and the “Arduino for mobility”. It is a versatile platform that can be used to bootstrap businesses, to create your own vehicle, for education purposes, and much more. Open Source All the plans and blueprints for TABBY can be downloaded in the website’s download section. You are welcome and encouraged to improve the designs, work on them, and upload them to share your ideas with the community through the OSV forum.

SENSORICA is an open, decentralized, and self-organizing value network. It is a commons-based peer-production network, focused on designing sensing and sensemaking technology.

Agora Voting -formerly known as Agora Ciudadana - is an innovative free software project whose aim is to create a social network for the people, allowing secure and scalable votings via Internet with just your web browser. Agora Voting is a social web site where anyone can create or join in an agora. An agora has a set of members which can vote in the agora's elections either by direct vote or by delegating the vote. You can see a live version of Agora here: https://agoravoting.com The source code is available here: https://github.com/agoraciudadana/agora-ciudadana

FilmAffinity is a movie recommendation system where users rate, critique and categorize films and series. The system provides for registered users a list of users with similar ratings.

ownCloud, Inc. provides an open source platform to sync, share, and view data and files. The company’s platform enables to sync and view contacts, calendars, and bookmarks across various devices and allows editing right on the Web. Its platform also enables businesses to host their own, on premises, or remote cloud storage. The company was incorporated in 2011 and is based in Lexington, Massachusetts with an international office in Germany.

Open source platform for community discussion and forums created by Civilized Discourse Construction Kit, Inc. a company incorporated in 2012 and based in the United States.

Som Energia is a Spanish cooperative social movement that has three main funtions 1) it commercialises 100% renewable electricity to the Spanish homes; 2) cooperativists collectively invest in installations to generate renewable electricity and 3) a social movement that shares knowledge and activism to build up pressure to change the electricity market in favour of a distributed renewable energy system.

Gitorious is a web-based hosting service for collaborative free and open-source software development projects that use the Git revision control system. The name also refers to the free and open-source server software that the Web site is developed and hosted on. History Gitorious was started by Johan Sørensen in the end of 2007 as a way to easily host Git repositories for himself.

SocialCompare.com is an innovative sharing community that allows users to consult, create, modify and share comparisons in any domain