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.
Sethi Search Utility is a simple command line utility to submit a search to Google, Yahoo!, or MSN and show the (text) results on standard output. Support for several search engines is included. It's currently in serious need of a re-write, especially to avoid scraping and become a good engine using the search APIs provided.
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.
Office Tournament is a tool for keeping track of office tournaments, such as foosball. You may enter data from the command line or from the CGI Web interface. It outputs all kinds of stats and even a nice chart if you use the Imager::Graph::Pie Perl library available from CPAN. It currently requires no database to run, but there are plans to migrate the text (flat file db) to MySQL.