Trac (Open Source)
Trac is an open-source project management and issue tracking system that can serve as a lightweight incident manager. It integrates a wiki, timeline, and ticketing for issues or tasks. Users add custom fields, track changes with version control integration, and maintain logs of each incident’s resolution steps. Trac suits dev teams wanting a simple, free, web-based tool for bug or incident tracking with minimal overhead and optional SCM integration (e.g., Subversion, Git).