Tiki vs Joomla!

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Both are full-featured free and open source web applications written in PHP with which you can realize a very diverse variety of projects.

TikiWiki is more centralized. TikiWiki is the all-in-one model while Joomla! (like Drupal) is the small-core-and-add-what-you-need model. Each model has its pros & cons. Because of these design choices, TikiWiki has more features out-of-the-box. With Joomla, you can add tons of features via extensions.
While TikiWiki is a very large and popular project (over 200 contributors to main code base and tens of thousands of installs), Joomla! is several times larger with millions of installs.
TikiWiki is Wiki-centric, whilst Joomla! is more web publishing centric. Please see (if) Why Wiki Syntax Is Important to your project.
Joomla! has extensions for features that TikiWiki doesn't have, ecommerce for example
Joomla! is GPL, TikiWiki is LGPL (you can use TikiWiki code within a commercial application)

Information	Version
28 Nov 2009 14:14 GMT-0000 Marc Laporte Avoid TikiWiki links all over the place	10	View
13 Sep 2009 19:15 GMT-0000 Marc Laporte	9	View
04 Apr 2009 21:33 GMT-0000 Marc Laporte	8	View
22 Dec 2008 13:23 GMT-0000 Rick Sapir / Tiki for Smarties joomla vs tiki installation comparison	7	View
31 Oct 2008 14:58 GMT-0000 Marc Laporte	6	View
05 Jun 2008 18:28 GMT-0000 Marc Laporte	5	View
05 Jun 2008 18:13 GMT-0000 Marc Laporte	4	View
05 Jun 2008 18:12 GMT-0000 Marc Laporte	3	View
05 Jun 2008 17:58 GMT-0000 Marc Laporte	2	View
05 Jun 2008 16:26 GMT-0000 Marc Laporte	1	View