Like some mentioned, Thimble uses Brackets in it's core. After some hiatus, Brackets has seen more commits to the past month than in the past year combined. Th

Like some mentioned, Thimble uses Brackets in it's core. After some hiatus, Brackets has seen more commits to the past month than in the past year combined. There's tons of starter issues (and more advanced ones) that can be tackled in the core right now too. If you want to get into OSS contributing or maybe you already are and want to contribute in general, check out the issues on GitHub! https://github.com/adobe/brackets https://github.com/adobe/brackets (Disclaimer: third party contributor of Brackets)