Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
Usersnap - Usersnap is a customer feedback software for SaaS companies that need to constantly improve and grow their products.
Redmine - Flexible project management web application
PlanShell - PlanShell offer a secure, low cost, unlimited project management & issue tracking redmine hosting services
FeaturePeek - Collaborate on in-progress website implementations. FeaturePeek allows your team to collect feedback on your front-end during the implementation phase of development.
Collabtive - Collabtive is a web-based project management software.