Isn't December the month you are supposed to be buying gifts for family and friends? The Mac development community is sorely tempting me with a series of good promotions.
This is a daily list of programs with 20% off. They then linger at 10% off until Christmas. Today they have several interesting applications on sale. I keep looking at SpamSeive. Hmmm.
This is a group of excellent European developers. You can put together your own bundle of software including such excellent programs as Pixelmator, CSS Edit, and RapidWeaver. You get 30% off if you buy three titles and it scales up to as much as 70% if you buy ten.