Who wants to even think about working on the TPS Report project on a Monday? To take the edge off, take some time and play around with Noisegames. These are very cool mindless yet fun interactive web toys.
I think Desktop Blues is my favorite. I can spend a good amount of time getting into this one. Not to mention this includes tablature for aspiring guitar players.
For those of you who require a heavier distraction from the salt mines is Guitar Machine. This allows you to mix various guitar sounds and drum beat sounds into a sonic wall of your liking.
For a killer break in the monotony of corporate lameness, this site can definitely take the edge off. There are seven other unique musical games also. From singing in the shower to creating a crazy alien acapella group!