#JChemPaint based on @cdk really is a gem from the 90s. The 2D chemical structure editor got a beta release yesterday after nearly a decade and during the #CDK25UGM hackathon I created a #flatpak at https://flathub.org/apps/io.github.jchempaint.JChemPaint for it.
Install JChemPaint on Linux | Flathub

Chemical 2D structure editor

Flathub - Apps for Linux
pretty cool to see #JChemPaint running with @cdk 2.11-SNAPSHOT :)