Kunagi - Kunagi is a web-based tool for integrated agile project management and collaboration based on Scrum
Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
GoodDay - Good Day - Inspiring work management
Redmine - Flexible project management web application
Trac - Trac is a project management and bug/issue tracking system. Provides an interface to Subversion and an integrated wiki.
VisionProject - Web based software for project management, issue tracking, collaboration, team calendar, kanban...