GLUE is a soapbox engine. It is a PHP/mySQL framework which can be used to set up discussion sites or Weblog sites. Its roots are from Weblogs, but unlike single-person Weblogs, its main focus is discussions. It can be used as simple Weblog software, a discussion site framework, or even as knowledge repository. It features themes, plugins/GLUElets, multiple-categories posts, comments, administration, and user customization, etc.
Lame Node System is a Web-based idea repository. It is aimed at people wishing to set up a personal site without the hassles of detailed Web page maintenance. It supports user accounts, flexible HTML theming, and several types of "nodes" (HTML input, files/external links, and pictures).
Tiki Wiki CMS Groupware is a full-featured, Web-based, multilingual, tightly integrated, all-in-one wiki, CMS, and groupware. Tiki can be used to create all kinds of Web applications, sites, portals, knowledge bases, intranets, and extranets. Tiki offers a very large number of features "out-of-the-box". It is highly configurable and modular. All features are optional and administered via a Web-based interface. Major features include a robust wiki engine, news articles, discussion forums, newsletters, blogs, file and image galleries, bug and issue trackers, a link directory, polls/surveys and quizzes, FAQs, a banner management system, calendar, maps, mobile access, RSS feeds, a category system, tags, an advanced themeing engine (Smarty), spreadsheet, live support, shoutbox, inter-user messaging, menu generator, advanced permission system for users and groups, internal search engine, external authentication support, and more. It was formerly named TikiWiki.
CourseForum is Web-based e-learning software that makes it easy for you and your students to interact, whether to create, post, share, or discuss course content. With just their Web browser, students use Courseforum to get answers to questions, dig deeper into issues, and work on projects at any time and from anywhere, not just when classes meet. It is powerful but easy to setup and use. Downloadable and hosted versions are available.