OurJSEditor
OurJSEditor is a form of social media for programmers. Instead of words or pictures, you can share HTML, CSS, and JS code.
These shared programs can be run, tweaked, forked, and voted upon. You can leave feedback on programs or subscribe to creators whose programs you like.
I began the project in 2017. I now consider it finished and am no longer updating the code. OurJSEditor is the largest sample of code I've ever written.
It is based on the Django web framework for Python. There are parts of the front-end written with and without React.
It is source-available on Github. I've taken contributions both big and small, but I'm the only one who has worked on it consistently.