At its core, VS Code is built on an open source project called Code OSS, published under the permissive MIT license.

Institutions across academic, research and national sectors are uniting around the FOLIO platform, built to grow with their needs and transform how libraries serve their users. With more than 300 ...

Zulip is the best open-source Slack alternative you can get, and it can be hosted on your own server or use it with a paid plan.