Open Source Learning Platform
A learning platform is a multi-year commitment in disguise: courses, grades, and years of student records accumulate inside it, so the real cost isn't the license but how trapped you are when you outgrow it or it changes hands. The open source systems here keep that coursework and enrollment history in standards-based formats on infrastructure you run, so an institution can extend the platform to fit its own pedagogy and still own the record of everyone who ever passed through it.

BigBlueButton
Open-source virtual classroom for audio, video, slides, chat, whiteboards, polling, and breakout rooms

Open edX
Open source LMS and Studio for authoring and delivering online learning at any scale

Moodle
Open source learning platform for creating personalized online courses and managing education at scale

Canvas LMS
Open-source LMS by Instructure for teaching and learning

Frappe Learning
Open source learning management system for structured courses, live classes, quizzes, and certificates

ClassroomIO
Open source learning management system for companies with compliance training, certifications, and AI course tools

Sakai
Open source learning management system for higher ed, built to run on Tomcat

Tutor
Docker-based Open edX distribution for production and local development

Chamilo
Open source LMS used by 40M+ people, in 60+ languages