What are some alternatives?
BugHerd - BugHerd: The Visual Feedback Tool for Websites
DoneDone - From planning, to coding, to testing, to customer support, DoneDone is the straightforward, no-nonsense issue tracker. Start a free 30-day trial today!
Trac - Trac is a project management and bug/issue tracking system. Provides an interface to Subversion and an integrated wiki.
Pivotal Tracker - Pivotal Tracker: The awesome, lightweight, agile project management tool for software teams. Get your 30-day Free Trial started today!
Bugify - Bugify is a simple PHP issue tracker, designed to offer powerful bug tracking capabilities in an easy to use system.
Lighthouse - Collaborate effortlessly on projects. Whether you’re a team of 5 or studio of 50, Lighthouse will help you keep track of your project development with ease.