Bugzilla is the leading open-source/free software bug tracking system, with high-profile installations at mozilla.org, GNOME, Red Hat, and NASA, among others. It features a comprehensive set of fields, attachment management, inter-bug dependencies, email notification of changes, a powerful query interface, reporting, and Web, XML, email, and console interfaces. It can be managed entirely using a Web-based UI. The user UI is customizable using templates.
phlyMail is a groupware, webmailer, and PIM. It offers unlimited nested groups, unlimited POP3/IMAP profiles, quotas, an integrated address book, a calendar with multiple reminders and event repetitions, a file manager with an integrated WebDAV server, the ability to send faxes, SMS support (which lets you send SMS, get reminded of events via SMS, and get email notification via SMS), a bookmark manager, themes, and multilingual support. It uses either sendmail or SMTP to send email, and can handle MIME and SSL connections. Support for IDN (Internationalized Domain Names) is included. Through its modular design, it's easy to add completely new features as modules, which can be plugged into the system.
MMBase is an Open Source Java-based content management system that can be used for publishing Internet content (e.g. Web sites, mailing lists, etc). It covers the whole spectrum needed to import, manage, maintain, export, and publish information. In other words, it contains Web-based editors for editorial people to insert, manipulate, and delete information. MMBase uses a jsp-taglib for Web designers to publish the information dynamically.
phpMyFAQ is a multilingual, completely database-driven FAQ system. It support various database systems and it also offers a content management system with a WYSIWYG editor, an image manager, flexible multi-group and multi-user support, a news system, user tracking, language modules, templates, PDF support, a backup system, Active Directory support, and an easy to use installation script.
Quantity/Formatter Library is a Java library developed in accordance to the quantity/formatter pattern (as demonstrated by the Date/SimpleDateFormat in the standard J2SE library). The following quantity/formatter pairs are currently available: Currency/CurrencyFormat, Density/ DensityFormat, Dimension/DimensionFormat, Distance/ DistanceFormat, ElapsedTime/ElapsedTimeFormat, Temperature/TemperatureFormat, Volume/VolumeFormat, and Weight/WeightFormat.