For several years now I've been using the Easy Window Drag autohotkey script to simulate the Alt+Drag feature that allows you to drag or resize a window by pressing on the alt key and then pressing on the window (left button to move, right button to resize) and dragging the mouse (this feature is available in almost every Linux window manager).
Since I moved this script has started working weird, sometimes it works and sometimes it doesn't, and today I found an alternative that works and it's called AltDrag, it's open source project in google code written in C, and it takes less than 2MB of RAM (which is another improvement) and it works perfectly!