Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
Adobe Learning Manager - Adobe Learning Manager (formerly Adobe Captivate Prime LMS) is easy to setup and helps in delivering engaging learning experiences in a personalized manner across devices.
SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
Udemy - Online Courses - Learn Anything, On Your Schedule
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Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!