TimeLog integrates tightly with Address Book, iCal™ and Sync Services and offers an intuitive interface that makes tracking time as easy as listening to music in iTunes™.
The global timer menu is accessible from within any application and allows to switch to another project with just one click.
Recordings are stored in iCal calendars which allows sharing of time sheets over network services such as dotmac, CalDAV and others.
Available in English, German, French, Italian, Spanish, Dutch, Norwegian, Swedish, Finnish and Polish
Also check out GrandTotal the invoicing app for TimeLog.