Devalot is a social networking application centered around software projects. It connects the user community with the development community and encourages participation and communication. It includes all the features you've come to expect in modern Web-based applications such as tagging, comments, and a wiki, as well as features you'd expect in project tracking software such as ticketing. It has features similar to some of those found in Trac, Collaboa, GForge, Mephisto, and Typo.
KwikWiki is a Web application that enables you to set up a Web site where anyone can edit the content of a page or add new pages. The system will track things like recent changes and indicate if a link is dead or not. It uses a very simple notation to create links and lists and to format text. KwikWiki also keeps every version of a page that is saved so you don't have to worry about losing old data. KwikWiki also has a fast and scalable full-text search functionality that does things like show all the pages which are related to the current page.
SCT (Sphene Community Tools) is a collection of Django applications that are designed to be easily pluggable into any Django project. It currently consists of a Wiki and a Board application. It contains an example project that allows users to create a community Web site containing the Wiki and Board applications without any further coding/configuration changes.
wiki2xhtml can create complete Web pages and uses a clean XHTML syntax. It can insert galleries, a menu, a footer, and nearly all elements you know from the Wikipedia. The pages are formatted with CSS. All designs can be adjusted by hand, and custom ones can be used as well. wiki2xhtml generates the HTML pages from simple text files in the MediaWiki syntax. You can also use own (X)HTML code or other script languages inside; there are no restrictions. The GUI is composed of a Code Paste Window where you can insert wiki code that will be generated live. A click into the result, the XHTML code, copies it into the clipboard.
WikklyText is a Python-based wiki and modular library for creating custom wikitext rendering applications. Its wikitext engine is compatible with the TiddlyWiki markup language. It functions equally well as a wiki-on-a-stick or as a multiuser wiki behind Apache. It includes a Drupal plugin as well.
DokuWiki is a simple, clean, and easy to use Wiki system that allows collaborative editing of a Web site. It's focused on creating documentation for developer teams, workgroups and small companies. The JumpBox for DokuWiki is a simple and quick to deploy solution that can be dropped into place in about a minute.
Trac is an advanced tool for managing software development projects. It provides a simple wiki, an issue tracking system, and tight integration with the Subversion revision control system. However, it's also notorious for being hard to install. With the JumpBox for Trac, it takes about a minute to get trac running. Plus, with the built-in subversion and database backup system and the JumpBox Web-based administration console, it gives you all the basic tools you need to put it into production without ever touching a command line.