FogBugz offers the best project management system for agile development: time tracking, issue tracking, and more!

• Agile Development Ready: Stick to the workflow that works for you including scrum, kanban or scrumban methods, so your team doesn’t have to jump through hoops between sprints or iterations.
• Integrate Main Tools: Google Drive, Twitter, GitHub, Slack and more.
• DevTools at Heart: We put developers first: Code hosting, version control, and peer code review tools are deeply integrated directly into FogBugz.
• Bring Teams Together: Converge customer feedback and issue tracking by giving developers all the context they need to find the best solutions, and support teams all they need to update customers in a timely manner.
• Be Proactive: Spot and resolve issues before customers even report them. With Crash Reporting, you know which bugs to prioritize, since your software can report errors, exceptions, and in-app customer feedback.
• Keep the Work Flowing: See and set estimates and priorities. Learn where work is getting held up, reassign tasks with drag and drop, and divide complex issues into tasks and sub-tasks.
• Track Issues: Tags let you easily categorize content and find it later. Simply enter the tag in the FogBugz tag field while editing a case or wiki article.
• Evidence-based Scheduling: Automatically estimate your real schedule.
• Version Control: Work on any part of your code: branch, merge, clone, push, or pull data.