Is there anything like window tabbing feature from fluxbox window manager in xfce?
Also, can one configure the size, position and similar properties of any given application window in xfce (I am looking for the analogue of .fluxbox/apps)?
According to Xfce FAQ the answer is no - the position and a size will be saved only when the application supports it. https://wiki.xfce.org/faq#window_manager
The one possibility for windows placement I'm aware of is similar to that used in Windows 7 <= OS - one can drag a window to the side or a corner of the screen in order to make it occupy a half or a quarter of it.
However if You use some programs on a regular manner, You can save Your session, so on each login, applications will be at the same positions, as during logout.