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Blender

Blender is a free and open-source 3D computer graphics software product used for creating animated films, visual effects, art, 3D printed models, interactive 3D applications and video games. Blender's features include 3D modeling, UV unwrapping, texturing, rigging and skinning, fluid and smoke simulation, particle simulation, soft body simulation, sculpting, animating, match moving, camera tracking, rendering, video editing and compositing. It also features a built-in game engine.

Rubyforge

RubyForge is a collaborative software development management system dedicated to projects related to the Ruby programming language. It was started in 2003 by Ruby Central in an effort to help the Ruby community by providing a home for open source Ruby projects. As of November 2009, it hosts over 8,000 projects and has over 41,000 registered users

Booktype

Booktype is a free and open source oftware for authoring, collaborating, editing, and publishing books to PDF, ePub, .mobi, ODT and HTML formats. It was launched by Sourcefabric in February 2012 when Booktype evolved from the Booki software, which powers FLOSS Manuals.

Wikimapia

Wikimapia is a multilingual open-content collaborative map, where anyone can create place tags and share their knowledge. The goal is to describe the whole world by compiling as much useful information about all geographical objects as possible, organize it and provide free access to our data for public domain.

HELibTech

The aim of HELibTech is to provide a starting point for anyone interested in library technology in Higher Education. HELibTech aim is to contribute into opening up the library technology market, involving all stakeholders in a 'conversation' (if you need help with adding your own article to the HELibtech wiki, you can contact the site's wikimaster).The focus is UK but most of the issues hope to be relevant elsewhere. It presents itself as a free and open community resource. However it is a commercial enterprise. The website is managed by Ken Chad Consulting.

Wikipedia

Wikipedia is a collaboratively edited, multilingual, free Internet encyclopedia that is supported by the non-profit Wikimedia Foundation. Volunteers worldwide collaboratively write Wikipedia's 30 million articles in 287 languages, including over 4.4 million in the English Wikipedia. Anyone who can access the site can edit almost any of its articles, which on the Internet comprise the largest and most popular general reference work, ranking sixth globally among all websites on Alexa with an estimated 365 million readers.

Safecast

Arduino boards can be purchased pre-assembled or as do-it-yourself kits. Hardware design information is available for those who would like to assemble an Arduino by hand. It was estimated in mid-2011 that over 300,000 official Arduinos had been commercially produced

Kuro5hin

A collaborative discussion website. Articles are created and submitted by Kuro5hin's users and submitted to a queue for evaluation. Site members can vote for or against publishing an article and, once the article has reached a certain number of votes, it is then published to the site or deleted from the queue.The site has been described as "a free-for-all of news and opinion written by readers".

Pages

There are currently 385 Commons-Based Peer Production cases!