What desktop GUI app have you created or are creating?

I'm working on a custom Laboratory Information Management System (LIMS) for my lab. We have a hyper specialized image capture and processing pipeline so I wanted to develop a system that's molded to that. It's mostly MATLAB, but I've sprinkled in a little Python for metadata extraction purposes.

Camp Counselor (https://line72.net/software/camp-counselor/). This is a GNOME application for managing your bandcamp.com wishlist.

My wishlist has grown to >1000 albums on bandcamp. It has become more of a "things to check out" rather than an actual wishlist. I need to be able to keep ratings and notes on the albums as a listen to them. (Even if I don't like an album, I keep it in my wishlist with a low rating and notes).

I wrote it in Gtk4 with Vala, as a chance to learn Vala. I haven't done any desktop software since the Gtk 2 days.

Part of this decision was that I use a pinephone with phosh as my primary music player, so I wanted a native mobile app.