A group of independent developers is banding together to offer deep discounts on their premium iOS apps for the holiday shopping season.App Santa is a collaboration of ten companies--including big names like�Readdle, Tapbots, Agile Bits, and RealMac--offering 15 of their apps, for discounts of up to 60 percent.The apps include such prominent programs as Clear and Tweetbot, both down to $2 from their usual $5. Other discounts include a cut from $18 to $10 for 1Password, $10 to $7 for PCalc, and $7 to $3 for Calendars 5.You can go to the App Santa site to see the full list of discount