Tiki is a powerful, all-in-one, web-based application that offers content management, collaboration, publishing, commerce, social networking, CRM and office productivity tools.
Tiki is the ideal tool for you to build and maintain your Website / Wiki / Groupware / CMS / Forum / Blog / Bug Tracker / Online Office Suite or any other project you can imagine running in your browser window.
Tiki is free, both Free Software (as in "Free Speech") and Free of Charge (as in "Free Beer"), and for everyone! It has all the features you need "out-of-the-box":
Wikis (like Wikipedia)
Forums (like phpBB)
Blogs (like WordPress)
Articles (like Yahoo News)
Image Gallery (like Flickr)
Map Server (like Google Maps)
Link Directory (like DMOZ)
Multilingual (like Babel Fish)
Bug Tracker (like Bugzilla)
RSS Feeds (like Digg)
Payments (via PayPal)
Spreadsheet, Slideshow, Drawings, etc.
Free Open Source software (LGPL)
And much more...
all integrated (like no one else)
Whatever you are looking for, chances are Tiki has it. Tiki is the Free and Open Source Web Application with the most built-in features.
Tiki is built upon these open source technologies
PHP scripting language
MySQL or MariaDB database
Smarty template engine