Traq

Trac is an enhanced wiki and issue tracking system for software development projects

Enterprise-grade issue tracking system

Simple-to-use and -install issue tracking system with command-line, web, REST, XML-RPC, and e-mail...

Collaborative plant management and tracking system for plant enthusiasts

Lean project management system for small teams and startups helping to manage projects from...

An agile(scrum) project management system/tool