coWiki - A content management tool with an intuitive markup language, unixlike access management, a directory structure and seamless page renaming.
FlexWiki - A wiki implementation that uses Microsoft's .NET technology (C# and ASP.NET) and has support for wiki namespaces.
GeboGebo - Wiki system - GeboGebo is an open source wiki system based on tdbengine. It is small, easy to set up and administrate and stores all data in a local, indexed database. It can optionally hold all content as static html pages, too.
instiki - A basic wiki-engine in Ruby with three-step installation. Contains a userguide, links to an IRC channel, and a mailing list.
Nanoki - A simple, elegant wiki engine implemented in Lua. Site contains documentation for the engine.
OpenWiki - An IIS/ASP implementation with strong XML support.
Perspective - Open Source wiki engine, written in C#/XSLT, that supports WYSIWYG editing, file attachments, searching across pages and attachments (including MS Office documents) and a flexible security model.
Platypus Wiki - A Semantic WikiWikiWeb that uses RDF to manage metadata and ontologies.
RWiki - A Japanese WikiClone built using dRuby, ERb, RDtool, MutexM; inspired by Tiki.
Sputnik - An extensible wiki written in Lua. It can also be used as a framework for building wiki-like applications. Contains documentation, forums, and a section for hosting user modifications.
SushiWiki - A wiki-like Web application running on .NET platforms. It is written in C#, uses ASP.NET features and stores data in SQL databases or flat XML files.
TiddlyWiki - An experimental microcontent WikiWikiWeb built by Jeremy Ruston. It's written in HTML and JavaScript to run on any browser without needing any serverside logic. It allows anyone to create self-contained hypertext documents that can be posted to any web server, or sent by email.
Vanilla - An extensible wiki engine written in REBOL, with weblog features and a streamlined interface.
Wiki Engines - Links to dozens of Wiki system types, in many programming languages.
WikiMatrix - A tool to compare the features of various popular wiki engines in comfortable side-by-side tables.
WikiWeb, Inc. - Commercial Windows-based implementation written in Smalltalk with limits on allowed named users, Access support, and ODBC support with more expensive versions.
Anything Goes Trivia
Last Kiss
Megaton Man
Trevor
