Mac users might be interested in a software promotion running through the end of the month called Give Good Food to Your Mac. A number of indie software developers have collaborated to bring you discounted software in this promotion.
I lost count, but there are well over 60 apps, utilities and games available. Buy 3 and get a 20% discount, buy 4 and get a 30% discount, or buy 5 or more for half price. I purchased a handful of programs through this promotion last year that I still use regularly. WIth such a diverse collection, you might find a few that are useful or interesting to you as well.