TweetCaster's free version does have ads, but that doesn't keep it from feeling polished and robust.
jEdit is a Java-based programmer's editor with a boatload of optional plugins, color schemes, and configuration options.
Read It Later Pro is a very capable app, though doesn't have many more features than the free version.
The Humble Bundle offers time-limited bundles of games and allows you set your own price and donate a part of the proceeds to charity.
PhotoTangler is an easy-to-use application that lets you create picture collages easily and visually.
WriteMonkey is a full-screen writing environment that lets you focus on what you're trying to say, and forget the rest.
Despite some annoying marketing gimmicks, Can Knockdown 2 manages to be addictive.
Weebly offers a powerful drag-and-drop platform for quickly developing websites.
Embiggen makes creative use of your screen, and works very well for broadcasting messages.
Goodsie offers a streamlined, beautiful way for small retailers to offer their goods online.
The five most recently reviewed files include screenplay software, a fabulous file-sync program in invitation-only beta, a promising IDE that needs some work, and a music and audio recording program.
Air Control is a simple game, but it is also surprisingly addictive.
Cloud9 IDE is a beautifully designed Web-based development environment that falls short on functionality and documentation.
AeroFS provides Dropbox-like seamless sync without using any servers, so you can sync unlimited amounts of data. It's in closed beta, but the vendor gave PCWorld two thousand invitations.