SizeUp 1.7.1 (Mac OS X)
SizeUp 1.7.1 (Mac OS X) | 4 MB
SizeUp allows you to quickly position a window to fill exactly half the screen (splitscreen), a quarter of the screen (quadrant), full screen, or centered via the menu bar or configurable system-wide shortcuts (hotkeys). Similar to "tiled windows" functionality available on other operating systems.
Additional features include moving windows from one monitor to another, from one Space to another, and restoring a window to its original size and position (SnapBack).
Split Screen Actions
Move and resize a window to fill the Left, Right, Top (Up), or Bottom (Down) half of the screen. Great for putting two windows side by side for comparison.
Quarter Screen Actions
Move and resize a window to fill a quarter of the screen (quadrant). Great for managing files in Finder.
Multi-Monitor & Spaces Actions
Move a window from one monitor to another and optionally resize the window to fit. Move a window from one Space to another.
Other Actions
My favorite, Full Screen maximizes a window to fill your screen, unlike that annoying green button. SnapBack restores a window to its original size/position before SizeUp touched it.
Requires OS X 10.6.6 or later
Home Page - http://www.irradiatedsoftware.com/sizeup/