ILIAS - For several of my clients in the health care domain, ILIAS turned out to be an excellent choice.
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Sakai - Historically, the community has aligned around a single project, the Sakai Collaboration and...
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Open edX - Open edX is implemented mostly in Python (with some Ruby and NodeJS as well) and the code is being...
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.