AltDrag allows you to drag windows with the mouse when pressing the alt key. You can use the middle or right mouse button to resize windows. If you press the shift key while you drag or resize, the window will stick to other windows. You can double-click a window to maximize it. You can double-click with the middle mouse button to roll-up windows. Fullscreen windows, such as games, will not be dragged or resized.
You can also enable an option to be able to use the shift key when normally moving windows, or a feature that makes windows automatically stick to other windows without needing to press shift.
Program made by Stefan Sundin. If you feel this program is useful, please consider donating money. Send me an email and tell me what you think, or if you want to translate the program. You can also check out some of my other projects.
Discuss in the forum (no registration required)
Updates 
2009-11-15: Released 0.8. The new things since the beta are 64-bit support for HookWindows, the ability to configure what keys trigger the alt dragging, the ability to reconfigure what the mouse buttons do. I have fixed a few bugs, most notable: the alt key will no longer trigger the window menu! New language: Russian by Gluek. If you are updating from 0.7, there are a few more things as well, which were described in the last update.
2009-09-07: Released 0.8 beta 2. I am releasing this as a beta but it is still the most recommended version available. I have made some major changes and fixes, not to mention a few new features. First of all, I have completely redone the feature previously called ExperimentalFeatures. I renamed it to HookWindows since I no longer consider it experimental and I encourage you to try it out. A few other new things are AutoStick, an improved version of StickyScreen, and RMBMinimize which makes your right mouse button minimize windows. I have also done a lot of fixes to multi-monitor support. New language: Galician by Alexander De Sousa. Users of 0.7 and 0.8b1 won't be automatically notified of this version. I plan to support 64-bit windows with HookWindows for the stable 0.8.
2009-04-24: Released 0.7. This version adds the ability to roll-up windows by double-clicking with the middle mouse button. I've also added a new feature called StickyScreen which makes windows automatically stick to the screen borders without needing shift. This only works with the Alt button unless you enable ExperimentalFeatures. I have also fixed a few bugs with ExperimentalFeatures, so it's working really well now, give it a try. In addition to that I've fixed a couple of small bugs, including an error message that sometimes popped up if you had AltDrag on autostart. I've also updated the installer, so upgrading should be a breeze.
Changelog
0.8 - 2009-11-15:
- Added AutoStick, enable it to make windows always stick without needing to press shift. This replaces StickyScreen.
- Renamed ExperimentalFeatures to HookWindows, also improved it so resizing is now supported and windows should no longer flicker. 64-bit programs also work now. I no longer consider it experimental!
- The alt key will no longer activate the window menu!
- Added the ability to configure what keys should trigger the dragging, resizing, etc.
- Added the ability to configure what the mouse buttons do. New actions: minimize and center.
- Improved multi-monitor support a lot.
- Tweaked the blacklist (see wiki).
0.7 - 2009-04-24:
- Added StickyScreen which makes windows automatically stick to the screen borders without needing shift (off by default).
- Added the ability to roll-up windows by double-clicking with the middle mouse button.
- Fixed some bugs in ExperimentalFeatures, it's working pretty well now so give it a try.
- Fixed an annoying error message that sometimes popped up when AltDrag was on autostart.
