Here´s just one from Native Instruments
Native Instruments is running a limited time 50% off deal on their software:
Between November 25th and 29th, 2010, you can save 50% on all* individual KOMPLETE Instruments & Effects in our Online Shop! Choose from 70 professional products like our brand-new sound controlled synth – THE MOUTH, exclusive keyboard phrases with GEORGE DUKE SOUL TREASURES, the essential ABBEY ROAD DRUMS series, and even hardware like KORE 2 and GUITAR RIG KONTROL.
Sounds like a great deal – unless you bought NI software recently. Details at the NI site.