I have used Quickbooks Pro’s timer before but mostly I use Allnetic’s Timetracker. I would prefer something decent for my PDA (palmos) but I have strayed from carrying it around and the last time I looked the available time trackers were inadequate. I need something I can wear on my wrist that autosyncs with the nearest computer via bluetooth. That way I can bounce from computer to computer and enter time tracking data from the keyboard (but the device still needs to accept entry from the wrist).
