Easy to set up bug tracking with Java
IGSuite is a web-ajax-based Integrated Groupware Suite
The Freeplane add-on that syncs a GTD mind map with a todo.txt file
Open source project management
Free flexible open source todo manager featuring hierarchical tasks
A note taking program with WebDAV sync
Outliner and time organizer for todo lists, events or scheduling tasks
Collabtive is web based project management software. Simple and easy.
PWM let you organize your project in a Web 2.0 way.
PHP & MySQL/SQLite -based Project Management System
Cross Platform Sticky Note App For The Desktop
SCRUM task board
A simple issue tracker system.
Protect your privacy!
A tool for tracking tasks of repetitive manual processes
Conscriptus Meet up!
LAMP-based Project Management System
A simple yet flexible portable plain text note taker for note addicts.