Atom , a text editor , Tree-sitter , a parser generator, and Electron , which can create desktop applications using web technology, has been made open source. Ta.

VZ Editor, a popular text editor for MS-DOS, has been made open source 30 years after its last update, and the source code and image files have been made public on GitHub.

At its Build 2025 conference, Microsoft open-sourced a number of apps and tools, including a new command-line text editor for Windows called Edit.