TestLink is a web-based Opensource Test management, Requirements management, and Test execution software tool.
TestLink install on the Windows Operating System.
Bitnami offers TestLink cloud images. You can deploy TestLink on the fly without the headache of setting up the required stack.
TestLink REST API Guide. API Versions, Slim Framework, Sample API calls.
Test Project & Test Plan
Requirements & Test Suite
Role & Builds
For more information on TestLink :
Official Website: https://testlink.org/