Sizer: "Sizer is a freeware utility that allows you to resize any window to an exact, predefined size. This is extremely useful when designing web pages, as it allows you to see how the page will look when viewed at a smaller size. The utility is also handy when compiling screen-shots for documentation, using Sizer allows you to easily maintain the same window size across screen grabs."
I also tried reSizer which seems to have better multimonitor support. Unfortunately, reSizer does not let you change the default hotkeys which are hardcoded to use numeric pad keys. On a laptop, the shortcuts get fairly complex if you have to turn on/off the numeric pad. The multimonitor options also offer no advantage on a laptop.
reSizer: "reSizer is a system utility that enables keyboard shortcuts to perform certain actions to the active windows. reSizer allows you to move, resize and change other window properties of any application in a fast and intuitive way without even touching the mouse.
reSizer allows instant positioning of windows to fit specific areas on the screen for content comparison and it's very useful when working in multimonitor environments. It also enables definable keyboard shortcuts to switch between different application types. "
Other promising utilities are Gridmove, which comes with sourcecode and makes no registry changes.
GridMove - DonationCoder.com: "GridMove is a program that aims at making windows management easier. It helps you with this task by defining a visual grid on your desktop, to which you can easily snap windows. This program comes bundled with some predifined grid templates, that can be easily swaped, but also has ways of creating custom grids or sharing grids made by others."And Acer GridVista, available here- Acer Europe - Service & Support, Drivers & Utilities, Downloads, Notebook, Aspire 3020 / 5020: "Acer GridVista"