Mgmendoza asked for more Mac downloads, prompting me to waste many a hour finding awesome downloads. No worries, I'll be sharing. Right now, I'm addicted to MacBreakZ, a chic and sophisticated Personal Ergonomic Assistant designed to promote healthy and productive computer use.
MacBreakZ utilizes a keyboard and mouse monitoring program that allows it to react to the way you are using your computer - and no, it doesn't invade your privacy. As you work, MacBreakZ provides you with instant feedback on how you are doing, giving you near instant analysis of your work habits.
Based on your actual keyboard and mouse use and the time you have spent in front of the screen, MacBreakZ pops up on your screen, suggesting you take rest and "microbreaks" at appropriate intervals. It also includes includes a set of 30 fully illustrated stretching exercises that are designed to reduce muscular tension, improve posture and strengthen appropriate muscle groups.
Download MacBreakZ from Publicspace.net. Works for Mac OS X 10.3 or higher.