TimeMachineEditor is software for Mac OS X 10.5 Leopard that lets you change the default one-hour backup interval of Time Machine. You can change the interval or decide to make daily, weekly and monthly backups.

 

This is useful if you don’t need to backup every hour or don’t want the associated performance penalty. This is also especially useful if you manipulate lots of data within one hour as you would spend the whole day backing up. [via]