Mac OS X only: Free utility TwoUp moves and resizes windows from the comfort of your keyboard for quick and easy optimisation of your screen real estate. Earlier this week we showed you Maxto, a similar Windows tool that tiles windows across your desktop via keyboard shortcuts. TwoUp is a similar beast, though it's unfortunately a little lighter on features. Where Maxto allows you to define regions on your screen for more fine-grained control over how large your resized windows are, TwoUp, simply halves your screen vertically and horizontally. By default, pressing Cmd+Opt+Ctrl+Up/Down/Left/Right will move and resize the active window to the corresponding half of your screen (the shortcuts are customisable). So while TwoUp doesn't quite pack the wallop of its Windows counterpart, it still packs some useful screen optimisation goodies. TwoUp is a free download, Mac OS X only. Thanks WandaRadassical!