I need a free bug tracker for my small project. I need keep track of bug, todo list and test case. Any suggestion?
Check out mantis http://www.mantisbt.org/
If it's a small project, though, you might want to think about using something with less overhead than a PHP-based system. Are you the only person working on it? A whiteboard and post-it notes might be less upkeep and could ultimately save you time and energy that would be better spent on the project itself.