Kualitee is your next ALM alternative in which you can create, manage and execute test cases. Whether its manual testing or automated testing, the tool is equipped to make your testing more efficient and fun. It's dedicated defect manage module saves those extra costs for bug logging and issue tracking. You can log bugs independent of test cases or you can optionally associate a bug with your failed test case. The tool provides complete traceability to specific parent requirement or sub-requirements with custom test and bug reporting.
My entire team use this for our clients. This is amazing product. If you are an individual or you have a team, it has amazing features with very low price.
TestRail - TestRail provides comprehensive test case management for software testing. Organize your testing, boost productivity, get real-time insights, and track progress toward milestones. Integrates with leading issue tracking and test automation tools.
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.
Qase - Test case management software for QA and development teams that helps you make your product better.
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
Klaros-Testmanagement - Klaros-Testmanagement is a professional web based test management tool.
openDesktop.org - The website openDesktop.