Happy milestone, Android Market! It's a busy place, full of hustle and bustle -- so much so, in fact, that the applications plaza for Google's mobile OS just had its ten billionth app downloaded. In honor of hitting this mark, it's passing the savings on to you, placing (at least) ten apps on sale for ten cents. The sale will last for ten days (notice a theme?), so procrastinators will have a little extra time to decide which ones are worth a dime. There's a few classics on the list, such as SwiftKey X, Minecraft, Asphalt 6 and SoundHound. Check the source link (or glance at the screenshot above) to see what else is available, as well as a press release straight from SwiftKey below the break.