I received a newsletter from [macxdvd.com] this morning as follows:

As we celebrate our anniversary, we're delighted to offer our award-winning product MacX DVD Ripper Pro for free, plus big save on all-in-one packages before May 23, 2012. And there is a 100% chance to win a free copy of MacX Video Converter Pro by participate our game.

PS: This activity is available for both Mac and Windows users.

Anniversary Celebration Page:

Cheers!