Comment by Y_Y

Very pleased to see LyX and Ipe here. They've been invaluable throughout my academic career, and are just a pleasure to use (once you get the hang of them).

The Qt/KDE world has (imho) some of the best quality software I've used, and is, astonishingly, relatively unpopular compared to FOSS competitors.

Ipe now has a web interface (through the magic of Qt) and I remember there was a plan to make one for LyX, though if it ever happened, I couldn't find it.