FuBar for the top. The buffs are from a mod that I dont beleive is updated anymore. Cant recall the name though.
As for the unit frames and general bottom portion of the screen I do not know. I would guess something with Discord. I wouldnt mind knowing which unit frames those are myself. Very sharp.
Edit: The buffbars are Morganti's BUffBars. I used to use them myself.
Thats Discord. The guy that made it is called Darktide and that's a UI called Stolen Litestep Theme. I used it until about a week ago. It's still available for download at Discord.