GitHub is a web-based hosting service for projects that use the Git revision control system. It is written in Ruby on Rails by Logical Awesome developers Chris Wanstrath, PJ Hyett, and Tom Preston-Werner.

Code collaboration version control. Offers hosted (freemium) for limited (5) users, and a commercial self-hosted for a subscription. Free licenses are available for qualified open source projects, nonprofits, and classrooms.

Redmine is a flexible project management web application. Written using Ruby on Rails framework, it is cross-platform and cross-database. It integrates with a number of different SCM:s including Subversion and Git.

Trusted by 11,000+ businesses, JIRA is the leading bug tracking, issue tracking and project management tool.

Trac is an enhanced wiki and issue tracking system for software development projects. Trac uses a minimalistic approach to web-based software project management.

Tracker is a story-based project planning tool from Pivotal Labs that allows teams to collaborate and react to real-world changes instantly. Its based on agile software methods, but can be used on a wide range of projects.

Host open-source software projects using Subversion or Mercurial for revision control. Google Code also includes a wiki for documentation, issue tracking and file download feature.

Mantis Bug Tracker is a free and open source, web-based bug tracking system. It is written in the PHP scripting language and works with MySQL, MS SQL, and PostgreSQL databases and a webserver.

Ubirimi is a whole Software Suite that offers a project tracker for teams planning, building and launching products, an Agile module for Software Development, a content creation, collaboration & knowledge sharing tool called...

OpenProject is an open-source project management software with a wide set of features and plugins.

Tuleap is the first fully libre and open source software (GPL licence) for Enterprise Application Lifecycle Management. Tuleap is provided by the Enalean company and the community members.

Gitea is a community managed fork of Gogs, lightweight code hosting solution written in Go and published under the MIT license.

Freshservice is an online ITIL service desk with a fresh twist. It puts a refreshing user experience on top of powerful ticketing and asset management capabilities, and is the most user-friendly app in the space.

ClockingIT is a free hosted application, keeping track of all your tasks and the time you spend on them. Extensive features Project Management, Collaboration and Time Tracking ...

The Bug Genie is an issue tracking and project management, completely free for small teams. Agile from the start The Bug Genie supports your agile process, be it Scrum, Kanban or other.

Comindwork offers innovative SaaS project managemen software for knowledge intensive collaborations online.

Lean Testing is a free test management solution complete with a free hosted bug tracker and test plan management software.

YouTrack is a web-based, keyboard-centric issue and bug tracker. Manipulate issues with just two simple controls and enjoy lightning-fast bug tracking and bug reporting!

FogBugz manages projects, tracks bugs, and even tells you when you’re going to ship. It includes an issue tracker, advanced project management and scheduling, a wiki, and customer support features like email routing and discussion groups.

Agile project management software for software development teams. Plan backlogs, manage issues and features, solicit incidents, and analyze and improve your process.

ZebraPlan is a powerful, yet simple-to-use Agile Project Management software in the Cloud. Ready to start working.

RT is an enterprise-grade ticketing system which enables a group of people to intelligently and efficiently manage tasks, issues, and requests submitted by a community of users.

HappyFox is a web based customer support ticketing system and is cloud-based. It is a centralized ticket support system that manages incoming request coming from multiple channels like voice, chat, email and social media.

Collect visual feedback from colleagues & clients directly into Trello, Asana, GitHub or Jira.

BamBam!™ is a collaboration platform for people of different roles and work styles for whom regular task management software is not enough.