Free and open-source tablature editor.

Open-source fine-grained authorization.

Open-source unified programming model

Open-source JavaScript library for UI

Open-source test automation framework

Open-source learning management system

Open source CMS for building websites.

Open-source monetization for developers.

Open-source web application framework

Open-source Java library for MapReduce

Open-source workflow management system.

Open-source load testing tool for APIs.