Our friend Cliff Harris has launched an awesome sale over on Show Me The Games. Aptly titled Show Me The Sales, you'll find Tidalis, AI War, and over a dozen other excellent indie games for a fraction of their standard price tag.
The cool thing about the sale, other than the nice discounts, is that 100% of all sales go directly to the developers. SMTG doesn't take a dime.
The sale only last 14 days, so if you're interested in supporting indie developers to the fullest and picking up some awesome titles (Frozen Synapse, Gratuitous Space Battles, VVVVVV, and many more), best take advantage of the offers soon.