Windows Server RemoteApp?

After getting this setup for work for a few clunky applications I was curious if anyone has any knowledge of a similar solution hosted on Linux?

Here is the link to the resource I used. Remote Desktop Service

Looks like after some digging I found something called ThinLinc (Cendio). Going to check it out to see how close it is.

Main goal of mine is to step away from Microsoft as much as possible.

xpra can do this

Thank you so much for this recommendation. This looks to hit the nail on the head.