Amazon Appstore for Android offers Minecraft: Pocket Edition for Android with 350 Amazon Coins (equal to a $3.50 Amazon Appstore credit) for $6.99. Assuming you'll use the credit, that's $3 below our mention from a year ago and the lowest price we could find by $4.
The Amazon Appstore offers downloads of Plex for Android for 99 cents. That's tied with our mention from last week and the lowest price we've seen for this app, which allows you to stream your music, videos, and photos from your home computer. (It's also a current low by $4.)