Two timer apps for OS X

If you're a Mac user to whom the adage "time is of the essence" rings true, you may want to check out Merlin Mann's review of two different timer apps over at 43 Folders. The apps are called Meridian and FlexTime, and both are relatively new programs from two different developers that offer a lot of customization for kicking procrastination to the curb and managing the balance of your day. FlexTime is currently free and Meridian is $19.95 shareware with a 30-day free trial.

Can any productivity-conscious Windows users point us to some useful timer apps for the rest of us?

Tags: flextime, freeware, gtd, mac, meridian, Merlin Mann, MerlinMann, osx, productivity, shareware, time, timer