It seems some of Avanquest's Xmas giveaways are still working. The guys from for-free-on-internet.com have made a list.
Not all tip top softwares on a 27 items list, but a few interesting ones : SnagIt 7, MediaMonkey, Safe'n'Sec Personal, PC Booster, eXpert PDF 4 ...http://for-free-on-internet.com/2009/03/free-promos-for-20-software-of-400-total-value/
Didn't try the tip yet but it seems not all working anymore (from comments).
Hope that helps!
Kane ... A Citizen