EasyWork

EasyWork is a shareware program which helps protect you from long time working in front of your PC by reminding you to have a rest at a specified interval. It's easy to use, and it runs in background without annoying you much. EasyWork starts at Windows startup by default (you can disable this in Settings menu), and runs in background quietly, showing a count down timer (the number of minutes before your next rest) in the form of a tray icon, and locks the screen when work period timer comes to 0. At this time, you should have a rest, by standing up, going for a walk, looking at green trees far away and so on. You also have options to postpone your rest by 1 minute or return to work mode when the screen is locked.

Limitations:

30-day trial