Sputnik is a content management system (CMS) designed for extensibility. It works as a wiki out of the box, but can be extended into other things. It offers editable nodes, history and diff, user accounts with optional email validation, a flexible permission system, RSS feeds, and more. Sputnik supports access control and has editable templates. It can be used to maintain a personal Web site that doesn't look like a wiki and that only you can edit. Sputnik is easy to install on shared hosting without root accounts.
Foswiki is wiki software, supporting the editing of Web pages in an ordinary Web browser by end users. What makes Foswiki special is that it supports the embedding of active and passive macros that enhance the page content (e.g. with global or dynamic information) and allow end-users to build applications that store and process data in a structured manner.
DrProject is a Web-based software project management portal that integrates a revision history viewer with issue tracking, mailing list management, a wiki, and other features. It is not a learning management system; instead, it is designed to introduce students to the tools that professional development teams use to coordinate their work. Unlike its industrial-strength cousins, SourceForge and CollabNet, DrProject is easy to install and administer. It has a very simple interface: students can learn all of its features in less than an hour. It provides a scripting interface that can be used to automate bulk or repetitive tasks.
Trac is an advanced tool for managing software development projects. It provides a simple wiki, an issue tracking system, and tight integration with the Subversion revision control system. However, it's also notorious for being hard to install. With the JumpBox for Trac, it takes about a minute to get trac running. Plus, with the built-in subversion and database backup system and the JumpBox Web-based administration console, it gives you all the basic tools you need to put it into production without ever touching a command line.
ClockingIT is a complete multi-user Web based project management solution with a focus on handling large amounts of tasks during software development. It features an unlimited number of projects and tasks, tagging, email notifications, RSS and iCal feeds, time tracking, file uploads, reports, forums, and issue tracking.
Devalot is a social networking application centered around software projects. It connects the user community with the development community and encourages participation and communication. It includes all the features you've come to expect in modern Web-based applications such as tagging, comments, and a wiki, as well as features you'd expect in project tracking software such as ticketing. It has features similar to some of those found in Trac, Collaboa, GForge, Mephisto, and Typo.
Streber is a wiki-based project management tool. Freelancers and small teams can easily use it to set up projects and keep track of tasks, milestones, issues, bugs, efforts, etc. Project user rights can be adjusted (e.g., to provide clients a limited view of the current project state).
bib_errors can be used to intercept runtime errors of PHP scripts. It registers a PHP error handler function that outputs the details about the errors to a given log file. The errors can be displayed as part of the current script output or sent to a given email address to let the site administration or developer react promptly.
Bug-A-Boo is a bug reporting and tracking system that runs on any Web server that supports CGI. It helps you to keep an eye on bugs reported to you by users of your software products. It can handle any number of projects, users, and bug classifications, and is really flexible in their setup. It features fast fulltext search, query storage, themes, and bug watches. It uses the tdbengine as a database backend.