CAD Software. There is CAD vs CAD esports. https://www.youtube.com/live/C1CqIcfDKbQ?t=1987s It seems dominated by solidworks but other programs (NX, Fusion 360...?) are allowed.
The bloomberg terminal UI.
Some emacs setups. (much more variability than VIM)
Some VIM setups.
The thing that all of these have in common is that they are designed for experts, not for every user. Also each one of those is a custom full platform app (or primarily text based) vs web app.