Ubisoft just announced a promotion that runs for the next 7 days. Several of their titles are discounted to $0.99 or FREE, so make sure you check them out.

MotoHeroz (iPhone, iPad, iPod touch) – free from September 11 to September 18
Michael Jackson The Experience HD (iPad) – discounted at $0.99 from September 13 to September 18
Babel Rising 3D (iPhone, iPad, iPod touch) – free from September 15 to September 18
Prince Of Persia Classic (iPhone, iPad, iPod touch) – discounted at $0.99 from September 17 to September 18

source: Ubisoft In The App Store