Social Source Commons

Wiki repository of other wiki pages.

TiddlyWiki with a PHP and MySQL backend

Organization chart wiki.

Wiki. Not open source, and only free to non-profits, but excellent.

Cyn.in is designed to help teams to communicate faster and build collaborative knowledge by sharing and discussing various forms of digital content in a secure application. Features capabilities like wikis, social networks, blogs, file sharing repositories, micro blogs, discussion boards and other communication applications into one secure enterprise platform.

DidiWiki is a small and simple personal WikiWikiWeb implementation written in C. Its intended for usage as an ad-hoc PIM, useful for note taking, TODO lists etc.

dotSUB is a browser based tool enabling subtitling of videos on the web into and from any language.

An open source wiki platform based on WikiWiki for collaborative editing and creating webpages.

GForge helps you manage the entire development life cycle

Web-based suite of tools such as an RSS reader, bookmarking service, and personal wikis.

Open Source wiki, with available extensions, serving as a place for project collaboration and shared editing.

LionWiki is a minimalist Wiki engine programmed in PHP. It is extensible, templatable, file based (it doesn't need database like MySQL) and requires just one file to function. It is suitable for small websites, personal notebooks or journals.

Mindtouch is the commercial open-source Wiki based on Deki Wiki

Near-Time integrates a group weblog with wiki pages, team events and shared files in a hosted and secure collaborative environment.

A collaborative project to produce a free, multilingual resource in every language, with lexicological, terminological and thesaurus information.

This is a collection of Free and Open Source (FOSS or FLOSS) software tools that support translation and localization of software and content.

These tools were mapped out and discussed by the participating projects at Aspiration's Open Translation Tools 2007 and Open Translation Tools 2009 events.

Please check out the wiki and participant video!

Tools tagged with ott07 and ott09 were represented at the respective events.

OpenStreetMap is a project aimed squarely at creating and providing free geographic data such as street maps to anyone who wants them.

Free hosted wiki software

Based off the WikiWikiWeb platform, PHPWiki is an open source collaborative website editing platform in PHP.

PmWiki is a wiki-based system for collaborative creation and maintenance of websites.

Wiki with purple numbers, transclusions, and other cutting edge experimental features.

wiki software with blog and user management and email integration and commenting

Wiki for users to provide technical support to other users.

ThoughtFarmer is Social Intranet Software. It combines traditional intranet features — things like news, structured content, search and an employee directory — with social software features, like blogs, feeds, wikis and social networks.

Tiki Wiki CMS Groupware is a full-featured, web-based, multilingual (35+ languages), tightly integrated, all-in-one Wiki+CMS+Groupware, Free Source Software (GNU/LGPL), using PHP, MySQL, Zend Framework, jQuery and Smarty. It is actively developed by a very large international community. Tiki can be used to create all kinds of Web applications, sites, portals, knowledge base, intranets, and extranets.

Tiki offers a very large number of features "out-of-the-box", arguably more than any other Open Source Web Application. Highly configurable and modular, all features are optional and administered via a web-based interface.

Major features include a robust wiki engine, news articles, discussion forums, newsletters, blogs, file and image galleries, bug and issue trackers (form generator), a links directory, polls/surveys and quizzes, FAQs, banner management system, calendar, maps, mobile version, RSS feeds, category system, tags, an advanced themeing engine (Smarty), spreadsheet, live support, shoutbox, inter-user messaging, menu generator, advanced permission system for users and groups, internal search engine, external authentication support, and much, much more.

A community project where open source software is internationalised and localised. Translatewiki.net is where Wikipedia is localised, this results in a community with localisation in over 150 active languages.

Translatewiki.net does localise other software as well when the software is freely licensed and when there is active support for the internationalisation of the software and when localisations are updated in a timely fashion

Auto-discovery button for editable websites - which typically are wikis.

WackoWiki is a light and easy to install multilingual Wiki-engine. Supports WYTIWYG-editing, page rights (ACLs), design themes (skins), file upload, email notification and much more. Compatible with PHP 7.2 / 7.4 and MariaDB / MySQL.

A smattering of popular Wiki engines that allow you to create collaborative web pages and sites.

Based on a list maintained by WikiMatrix.

Enables creation of collaborative maps to locate people, projects, businesses,complaints, activities, community and social issues.

Simple, easy to use, free wiki service.

WikkaWiki is a flexible, standards-compliant and lightweight wiki engine written in PHP, which uses MySQL to store pages. Designed for speed, extensibility, and security.

Sharable web-based document editing

XOOPS Cube is a a free Open Source Web Application Platform released under BSD license and Base Legacy modules released under GPL license: user and groups management, message, search, forums, social news, rss, gallery, blog, flat data and contact forms and much more plug-ins.

The XOOPS Cube Project is friendly managed, maintained, developed and supported by a volunteer group to expand your network, vision, creativity and skills.