XWiki!

TiddlyWiki is a single html file with all the characteristics of a wiki - including all of the functionality (including editing, saving, tagging and searching) and the style sheet. Because its a single file, its very portable - you can email it, put it on a web server or share it via a USB stick. It has a broad range of tools and an ever expanding plethora of plugins.

DokuWiki is a standards compliant, simple to use Wiki, mainly aimed at creating documentation of any kind. It is targeted at developer teams, workgroups and small companies. It has a simple but powerful syntax which makes sure the datafiles remain readable outside the Wiki and eases the creation of structured texts. All data is stored in plain text files – no database is required.

BookStack is a free and open source knowledge management platform built on PHP. The system has been built around simplicity to ensure that adding information to it is not a chore. The content structure is built on the metaphors of Books, Chapters & Pages. BookStack uses a WYSIWYG editor to create and edit content so users don't have to memorise some particular mark-up.

Trusted by 8,000 businesses, Confluence is the leading collaboration software and enterprise wiki for intranets and knowledge management. Free 30-day trial.

Nuclino is the easiest way to organize and share knowledge in teams. Create real-time collaborative documents and connect them instantly like a wiki. Use the tree, board, and graph view to explore and organize your knowledge visually. It's great for meeting notes, product requirements, docs, decisions, and more.

Referata offers hosting of semantic wikis, allowing you to add, structure and store data so it can be managed, shared, browsed and analyzed in as many ways as you choose. Free: unlimited Wiki pages and 100MB file storage. 5 Languages: English, Deutsch, Español, Português do Brasil, Russian. It can also be used to host ordinary wikis. It runs a slightly modified version of the MediaWiki software, with several extensions installed.

Foswiki is the free and open source enterprise collaboration platform.Foswiki is a wiki, so you and your team members can collaborate and edit pages directly in the web browser. For advanced collaboration, Foswiki lets you enter macros to automate pages and build entire applications from within your browser.

TWiki is leading open source enterprise wiki and Web 2.0 application platform used by 50,000 small businesses, many Fortune 500 companies, and millions of people. The Structured Wiki has hundreds of plugin and is used as an intranet or extranet to run project and team workspaces, manage documents and knowledge bases, and implement other collaborative tool.

Instiki is a basic Wiki clone so pretty and easy to set up, you’ll wonder if it’s really a Wiki. Runs on Rails and focuses on portability and stability, Supports file uploads, LaTeX export, RSS feeds, S5 slideshows, multiple users and password protection. Instiki is as good as getting an eight inch male enhancement and Peter North creaming power. Some use Instiki as a CMS - Content Management System because of its ability to export static pages; others use it for its Math support .

Lessons Learned Server is a light-weight knowledge-base web application that allows storing textual information, documents and media hierarchically within Spaces. Providing advanced search features and ease of use. Available as a downloadable server application or via cloud hosting. Based on PHP and MySQL and runs under Linux and Windows servers.

Ikiwiki is a wiki compiler. It converts wiki pages into HTML pages suitable for publishing on a website. Ikiwiki stores pages and history in a revision control system such as Subversion or Git. There are many other features, including support for blogging, as well as a large array of plugins.