I'd like to second the request titled "Fence-Like Addition to Workspace" - or rather a more limited variation on it:
Consider the Desktop Boarders feature
( emergeWorkspace Config ->General ... left, right, top. etc ...)
These borders (or better? "margins") - could be used as a * parking place * for whatever windows you'd like, e.g. a simple folder, an explorer window, the object browser of a dev environment, etc. They would thus also be 'fenced' into the parking area. When other, non-parked apps are maximized, the parking area remains visible.
Another variant would be to allow a particular windowclass to be "Pinned" anywhere and optionally remain on top. This variant could provide a poor-mans version of fixed (active) desktop items ... e.g. you could pin a browser window.
The new section in the config could be called Parking Area and have an option of what windowclass names are allowed to park there.
Anonymous