Move/resize windows a la X Window

One the things I missed the most when I moved to Os X was the ability to move and resize any window like you can do on Linux, running X11; where you can simply grab a window and move it by pressing a keyboard/ mouse combination anywhere on the given screen.
I looked all around for such an option, but couldn't find none, even on Windows there is such a thing... win32WM

Yesterday, by mistake, I found a couple of programs that can do that:

WindowDragon

WindowDragon   Musings from Mars blog post/ review

WindowDragon  MacUpdate download page

WindowDragon  Status-Q blog post/ review

GeekBind

Share/ Payware

MondoMouse Resize, focus follows mouse, etc.

MondoMouse Mac Os X Hints - Resize and move windows via mouse drag

OCSmart Hacks