WinSplit Revolution

similar to windowpad but more options - like different sizes on multiple commands, ie., ctrl+alt+numpad4 makes the window take up half the screen (left), ctrl+alt+numpad4  again shrinks it down to a third of the screen then ctrl+alt+numpad4 one more time and it takes up two thirds of the screen

all this is customizable

rainmeter

desktop styling app - very nice eye candy

http://rainmeter.net/cms/

x mouse button control

much like katmouse but with more control

http://www.highrez.co.uk/downloads/XMouseButtonControl.htm

Tiny Spell

simple background app that spell checks for you. it even tries to stay out of the way when you are using a program with a built in spell checker

http://tinyspell.numerit.com/

Window Pad

Haven't used this a ton but there is one feature I LOVE!

I'm a supporter of the snap feature to re-size windows to fill one side of the screen, but Windows only allows that on the far right, far left, and full screen. This is n't an issue with a single screen, but with multiple monitors it was a lot of snapping and then dragging into the position I wanted. With windowPad, I use the number pad and can easily make a window (on either monitor) half screen inside,outside, top or bottom. then I can also make it 1/4 the screen in a corner or vertically or horizontally...

I think you get the picture

Only drawback is that there is a shortcut that instead of holding in the windows key as the trigger to start the re-sizing, you can also use the zero on the 10-key. so when entering number is can re-size the windows which was annoying for a bit but it taught me not to have a lazy thumb when entering numbers.

WindowPad