While Tiki is the most full featured, there is no shortage of other wiki clones.
The canonical list is available at WikiEngines at C2
Ones to watch:
- TWiki — The most impressive "pure" wiki out there. Perl, but amazingly powerful Link
- WakkaWiki — Getting more and more popular. No page delete as of Oct. 3, 2003. Strong competition to PhpWiki. Link
- WikkiTikkiTavi — Popular PHP wiki, active development. Link
Here is a short list of others:
- coWiki — Cool ideas, requires PHP 5 Link
- ASPWIki — A simple ASP script for a simple wiki Link
- Bloki — A site hosting wikis, attempts to integrate blogs, forums Link
- Blue Oxen Associates: PurpleWiki — A modified version of UseMod with "Purple numbers", Perl Link
- cwick — A heavily modified UseMod wiki, Perl Link
- Dolphin Wiki — Easy to use, Perl, cannot rollback (as of Oct 3.2003) Link
- Eddies Wiki — Completely self-contained wiki in c++; includes its own web server! Windows only. Link
- ErfurtWiki — A single script PHP wiki, can be embedded in other CMS systems. Handles Plugins, Images. Link
- Fitnesse — A stand-alone wiki and test harness. Lots of emphasis on refactoring. Java. Link
- Noodle — ASP Wiki in VBScript for IIS. Can store in Access or filesystem. Link
- JassWiki — ASP Wiki based on Dolphin. Link
- JSPWiki — Supports categories. Java (duh) and Servlets. Relatively popular among the java crowd. Link
- KeheiWiki — Powerful by obtuse Link
- langreiter.com Vanilla — Interesting mix of Blog and Wiki, emphasizing "snips" as content units. Rebol (don't ask). Link
- MediaWiki — the Phase III wiki of WikiPedia. Way back when, they used a heavily modified PhpWiki, but now use their own code. Link
- MoinMoin — Popular Python wiki, based on PikiPiki. Link
- Apache::MiniWiki — Perl module for embedding or hosting a wiki Link
- OpenWiki — Relatively powerful ASP based wiki Link
- OddMuse — Perl based wiki used by EmacsWiki. Link
- Pepys — A single user Wiki in Windows for free, pay for collaboration Link
- PhpWiki — a very popular wiki in PHP. Development has slowed down, but still a very well put together implementation. Link
- PmWiki — PHP wiki, some clever touches, active development by author Link
- Prowiki — A commercial wiki (can you believe it?) Link
- PWP Wiki Processor — PHP powered Wiki using flat files as data storage, built to run on cheap web packages Link
- QwikiWiki — Simple PHP Wiki Link
- SnipSnap — Based on Vanilla, a Snip based Blog/Wiki in Java. Some clever ideas here Link
- Friki — Small Java wiki, needs a servlet container Link
- Perki — Supports categories, user permissions, document versioning. Perl. Link
- Spinner Wiki — Spinoff of Dolphin, Perl Link
- Swiki --Wiki implementation running under Squeak and Comanche Link
- also check out Project Swiki, a beta version that allows for text and high-end dynamic media. Link
- KwikiKwiki — Perl and easy, but no diffing! Link
- UseMod — One of the original Perl wikis, and still one of the most popular Link
- VeryQuickWiki — Java and servlets. Link
- Wiki! --Compact flat-file PHP wiki system, supporting full templating, user logins and revision history Link