https://www.omgubuntu.co.uk/2009/11/aero-snap-ubuntu-linux:

For those who don’t know what Aero Snap is i shall try and sum it up in on sentence: Aero Snap allows you to minimize, maximize and resize windows by simply drag-dropping them to the sides of the screen.

It’s useful for comparing the contents of two windows side-by-side.

E.g., Xubuntu and most(? other contemporary desktops have this enabled by default.

I use it all the time.

Maybe this could be addressed along with #41 by allowing Compiz to be used.