Amazon offers a selection of downloads for Android for free via its new Amazon Underground app. (Follow the instructions on this page to download the app.) With 1,861 apps on offer, that's over 500 more than our mention from two weeks ago. Choose from games, photography apps, and productivity apps. A few notables:

• DuckTales: Remastered for Android for free (low by $10)
• Mobisystems OfficeSuite Professional 8 for Android for free (pictured, low by $15)