Another vote for ShiftIt here. I've been using it for a couple of years now, and I've found it fine for most purposes. Supports XQuartz+xquartzwm, supports mult

Another vote for ShiftIt here. I've been using it for a couple of years now, and I've found it fine for most purposes. Supports XQuartz+xquartzwm, supports multiple monitors, has configurable keyboard shortcuts. A few more options would be nice, though - I somewhat often want 3 columns in a row, for example, particularly on a 16:10 or 16:9 screen monitor. When I had a 10:16 portrait monitor setup I quite often wanted 3 rows in a column, too.