I'm sure most folks get their apps from the Google store but the Amazon Android App store (Amazon.com: Online Shopping for Electronics, Apparel, Computers, Books, DVDs & more
) is currently offering a $5 credit on apps. To get the credit you need to download the Amazon App store app to your android device, if not already on it, and download one app (can be a free one) by 28 December. A couple apps that are free today (normally $1-3) on Amazon that I like are 'Relax Melodies Premium', 'Moon Phase' and 'My Alarm Clock'.
'Office Suite Pro 7', normally $15, is on sale today at the Google store for $0.99, and rumor has it will be offered tomorrow on Amazon for $0.99 (or free if you make use of the $5 credit).
I like 'Pulse' as a good customizable current news story feed.