Mylyn is a subsystem of Eclipse for task management.
Mylyn is an open source implementation of the Task-Focused Interface, it's also an application lifecycle management (ALM) framework for Eclipse. It provides an application programming interface for tools embedding the task-focused interface. For software developers, it helps a developer work efficiently with many different tasks (such as bugs, problem reports or new features). Tasks are integrated into Mylyn; for all tasks that have been integrated, Mylyn monitors user activity and tries to identify information relevant to the task at hand. It uses this task context to focus the Eclipse UI on the related information. Mylyn can integrate with repositories such as Bugzilla, Trac, Redmine, Mantis, JIRA, Unfuddle, and GitHub.
It focuses on improving productivity by reducing searching, scrolling, and navigation. By making task context explicit, Mylyn is also meant to facilitate multitasking, planning, reusing past efforts, and sharing expertise.