Open Source Project Management Software

Task Coach - Your friendly task manager. Task Coach is a free open source todo manager. It grew out of frustration about other programs not handling composite tasks well. In addition to flexible composite tasks, Task Coach has grown to include prerequisites, prioritizing, effort tracking, category tags, budgets, notes, and many other features. However, users are not forced to use all these features; Task Coach can be as simple or complex as you need it to be. Task Coach is available for Windows, Mac OS X, and GNU/Linux; and there is a companion iOS app.

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 Tasks. Compatible with php 7.2+ and php 8.0+

ONLYOFFICE Workspace is an open-source business platform that addresses collaboration challenges for both small and medium-sized teams and large enterprises. Available in 27 languages, ONLYOFFICE Workspace increases the overall performance of any team no matter how remote the members are located. It provides tools and apps for AI-powered document editing and co-authoring, file management, project and task planning, email management, CRM management and online communication, all available within one platform. ONLYOFFICE Workspace allows for the optimization of your business processes from lead generation to order fulfillment. Combining a versatile set of tools, ONLYOFFICE Workspace helps entities in any field, from retail sales to industrial engineering and banking. The broad access permission settings make the platform an ideal choice for any executive striving for business excellence and. ONLYOFFICE Workspace offers self-hosted deployment and a vast array of security features.

PHP web-based project management framework that includes modules for companies, projects, tasks (with Gantt charts), forums, files, calendar, contacts, tickets/helpdesk, multi-language support, user/module permissions and themes

Project management and collaboration over the internet. Features team/client sites, task assignment, document repository/workflow, gantt charts, discussions, calendar, notifications, support requests, weblog newsdesk, invoicing, and many other tools.

netOffice Dwins is now webTareas. http://sourceforge.net/projects/webtareas

PXell - Online project management with team collaboration, user management, multiple access levels, tasks, projects, and time tracking, task change history, files approval tracking, notes, client project sites, CRM, Gantt graphs...

Web based Help Desk for small teams with low number of request. Possibility to use as task management system for many teams. Multilanguage support. Built on Liberum Help Desk core with redesigned interface and limited functions.

Free web-based bug tracking system written on PHP. Some of the main features are: fully custom templates, advanced filters, LDAP support, email notifications, subscriptions, reminders, flexible permissions management, graphical project metrics, etc.