https://adtmag.com/articles/2020/04/02/eclipse-open-source-alternative-to-vs-code.aspx

The Eclipse Foundation has released Eclipse Theia 1.0, which it is promoting as "a true open source alternative" to Microsoft's lightweight Visual Studio Code (VS Code) source code editor.

An extensible platform for building multi-language desktop and Web-based IDEs from the same codebase, Theia was started in 2016 as a project by Ericsson and TypeFox, and it became an Eclipse project in 2019. It's now one of the projects in the Eclipse Cloud Development Tools Working Group (ECD WG), an industry collaboration focused on delivering development tools for and in the cloud.