Panopticon is a game of data and control released under a creative commons licence so you can adapt it how you want.

Ongoing Worlds is a website for people to setup a play-by-post game (PbP game), invite members, and post their ongoing story. A PbP game is an online text-based role-playing game in which players interact with each other and a predefined environment via text. It is a subset of the online role-playing community which caters to both gamers and creative writers

Stencyl is a game creation platform that allows users to create 2D video games for computers, mobile devices, and the web. The software is available for free, with select publishing options available for purchase. StencylForge is the repository for user-created (and team-created) resources. StencylForge hosts all of the following kinds of resources: graphics, sound effects, music, behaviors, example games, kits, etc.

The Steam Workshop is a central hub of player-created content and tools to publish, organize, and download that content into the video games of the Steam platform (see below). Different games will utilize the Workshop in different ways. Some games, like Team Fortress 2, allow you to create and submit new items (such as hats, weapons, badges, boots, and more) for consideration to be incorporated into the actual game.

BoardGameGeek is an online board gaming resource and community. There are reviews, ratings, images, play-aids, translations, and session reports from board game geeks across the world, as well as live discussion forums. In addition, every day nearly a hundred game trades pass through the hands of registered members, as well as transactions in the marketplace. The site is updated on a real-time basis by its large user base. BoardGameGeek was founded in January 2000 by Scott Alden and Derk Solko as a resource for the board gaming hobby.

Netention is SEMANTIC GROUPWARE that automatically organizes a community of peoples' realities. It can then interlink them with automatically discovered opportunities that are mutually inter-satisfying - essentially suggesting to its participants how they could realize the desired futures they have described.

OpenROV is a open-source underwater robot. Its operating system is based on Linux.

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.

Spain Gamers is a digital space to share game experiences, tricks and strategies about the most popular games within the gamers community.