Code editor "Zed" has now been open sourced by it's creators. The Zed editor will be GPL licensed while server-side components are AGPL licensed. The GPUI UI framework that powers Zed will be under an Apache 2.0 license. Currently it's only available as a .dmg and as source code so if you're on Linux or BSD you'll have to build from source. Hopefully this changes soon.
The project's main website is here:
https://zed.dev/
The source code is available on Github:
https://github.com/zed-industries/zed