qdPM is a free web-based project management tool suitable for a small team working on multiple projects. It is fully configurable. You can easy manage Projects, Tasks and People. Customers interact using a Ticket System that is integrated into Task management.

Feng Office is a Collaboration Platform that enables you to manage your projects and business services, collaborate with your team and your customers, organize and share documents and files. Feng Office is being actively developed.

eyeOS is a disruptive desktop entirely usable from a web browser. It includes an office suite and some collaboration aplications, as well as a full framework to develop new web apps as if they were desktop apps. Free and Open Source so you can host your own system, keeping all your data under your control.

Collabtive is web-based project management software. Collabtive is intended for small to medium-sized businesses and freelancers. Collabtive is cloud based groupware easy and efficient for your projects.

dotProject is a web-based project management application, designed to provide project layout and control functions. Project Management is about the structuring of a series of tasks and the schedule associated with those tasks, to achieve an outcome. dotProject aims to provide the project manager with a tool to manage tasks, schedules, communication and sharing.

ProjectPier is a Free, Open-Source, self-hosted PHP application for managing tasks, projects and teams through an intuitive web interface. ProjectPier will help your organization communicate, collaborate and get things done Its function is similar to commercial groupware/project management products, but allows the freedom and scalability of self-hosting

MantisBT is a free popular web-based bugtracking system. It is written in the PHP scripting language and works with MySQL, MS SQL, and PostgreSQL databases and a webserver. MantisBT can be installed on Windows, Linux, Mac OS, OS/2, and others. Almost any web browser should be able to function as a client.

The Bug Genie Friendly issue tracking and project management. Issue tracking and project management never looked this good. Designed to be beautiful, powerful and friendly - The Bug Genie is an absolute treat - and it's all yours.

PHProjekt is a modular application for the coordination of group activities and to share informations and document via the web. Components of PHProjekt: Group calendar, project management, time card system, file management, contact manager, mail client and many other modules.

TaskFreak! Original is a simple but efficient web based task manager written in PHP. Originally created in September 2005, it has evolved over the years. It is now available in 24 languages.

todoyu is the web-based way to get your tasks done. todoyu is all about bringing your team and clients together to work jointly on projects. todoyu is as simple as needed and focused on the most important: Enable your team to work as efficient as possible. Focus your work on your projects and let todoyu do the rest for your in one tool: time tracking, reporting, organizing, approving, controlling, discussing, billing and much more...

Flyspray is an uncomplicated, web-based bug tracking system written in PHP for assisting with software development. It was originally conceived when the Psi Jabber client project couldn't find a bugtracker that suited their needs, and has been made available for everyone to use for their own projects.

phpCollab is an open source internet-enabled system for use in projects that require collaboration over the internet. Those organizations, such as consulting firms, that rely on a division between firm-side and client-side information will benefit most from use of phpCollab

Traq is a PHP powered project manager, capable of tracking issues for multiple projects and multiple milestones, there is also a project timeline which displays events about tickets milestones and more.

SiteDove Free is a powerful tool for beefing up the security of your website at NO COST. It includes a unique Burglar Alarm that shows you when changes are made to files on your site. If you're not sure who made those changes, you will want to investigate to see if your site has been hacked. In this way, SiteDove Free acts as an early warning system that can detect malicious attacks long before search engines and your readers encounter them.

Eventum is a user-friendly and flexible issue tracking system that can be used by a support department to track incoming technical support requests, or by a software development team to quickly organize tasks and bugs.

Admidio is a free online membership management, optimized for clubs, groups and organizations. It consists of classical management members from a variety of modules that can be installed and adjusted to a new or existing website. Registered users have your website by Admidio including access to predefined and user-configurable membership lists, people profiles and an Agenda. In addition, members may be pooled in groups are assigned properties and search for it.