Whenever I need a break, I take time to either play with computer games or listen to my iPod. But, I normally get bored with playing the same songs or the same games.
So, it is nice to know that there are mac games available for free trial and download and cool iPhone applications at very very reasonable rates.
I personally like puzzle games like world of goo for mac or mac solitaire that can do well during relaxation time.
I wish to add some applications to my iPod and perhaps, my students would love new games on their Mac PC's.