Benefits of Testlink:
This is open source (free to use) test management tool.
Easy to maintain for multiple project( don’t have to write test case again and again)
Centralized Repository for all Test cases
Centralized Repository for Results
Bug Tracking tool can also be integrated( Jira, Bugzilla etc.)
Requirement mapping can be done
Multiple Reports and charts can be viewed( Build wise Report, Multiple build execution report, Requirement coverage report, Total bugs logged for the application etc).Report can be viewed on email