The Free / Libre / Open Source Web App with the most built-in features
"Software made the wiki way" A full-featured, web-based, multilingual (40+ languages), tightly integrated, all-in-one Wiki+CMS+Groupware, Free Source Software (GNU/LGPL), using PHP, MySQL, Zend Framework, jQuery and Smarty. Tiki can be used to create all kinds of Web applications, sites, portals, knowledge base, intranets, and extranets. Tiki is the Open Source Web Application with the most built-in features. Highly configurable and modular, all features are optional and administered via a web-based interface. Major features include a wiki engine, news articles, discussion forums, newsletters, blogs, file galleries, bug and issue trackers (form generator), polls/surveys and quizzes, banner management system, calendar, maps, mobile , RSS feeds, category system, tags, an advanced themeing engine, spreadsheet, drawings, inter-user messaging, menus, advanced permission system for users and groups, search engine, external authentication, etc. Security reports: firstname.lastname@example.org
Umbraco alternative 8, .NET CMS forum & wiki multi site/domain
Umbraco alternative is an open source content management system (CMS) platform for publishing content on the World Wide Web and intranets. It is written in .NET and deployed on Microsoft based infrastructure. This software is a fork of ".net cms", new feature: Multi website, multilingual, multi domain, html5 100% validate code, responsive, databaseless, forum software, wiki, portable, rich snippets microdata.
WackoWiki is a light and easy to install multilingual Wiki-engine.
WackoWiki is a light and easy to install multilingual Wiki-engine. Supports WYTIWYG-editing, page rights (ACLs), design themes (skins), file upload, email notification and much more. Compatible with PHP 7.0 / 7.2 and MariaDB / MySQL.