FogBugz is an integrated web-based project management system featuring bug/issue tracking, discussion forums, wikis, customer relationship management, and evidence based scheduling. Developed by Fogcreek
License: Commercial
FogBugz is primarily focused on bug tracking and project management, making it suitable for software development teams. TeamClerk, on the other hand, emphasizes team collaboration and communication, making it a better fit for teams focused on overall productivity.