Smart Office 2 ($10.99 → Free, 23.9 MB): View, create, edit, and share Office documents with this productivity app. The app is loaded with features, including a variety of formatting and font options, preloaded templates, search, AirPrint support, the ability to export files as PDFs, and Dropbox and Google Docs integration. It also supports a wide variety of file formats.
Smart Office 2 is available for free for a limited time. It has a 4-star rating with a total of 3166 ratings.
Infinity Blade ($5.99 → Free, 595.2 MB): Journey to the Dark Citadel to battle powerful Titans and free your people from an endless legacy of darkness in this visually stunning combat game. Swipe across the screen to perform attacks, dodge blades, block hits, and cast devastating spells. As you make your way deeper into the castle realm, you’ll have a chance to upgrade your knight and collect new weapons and armor. The game includes gorgeous 3-D graphics powered by the Unreal engine, online multiplayer, and achievements and leaderboards via Game Center.
Infinity Blade is available for free for 7 days only (Feb 14th—21st, 2013). It has a 4.5-star rating with a total of 16500 ratings. Probably the GREATEST iOS game of ALL TIME!
Echograph — Create Cinemagraph Animated GIFs ($0.99 → Free, 42.0 MB): Animate only portions of your videos with this wildly entertaining photography app. You’re able to capture a new video in-app or import one from your library. Trim the duration of the video down to less than five seconds to make it more manageable. A still frame must be selected from the video to set the background. You can then paint in the portion you want animated with the tip of your finger. A mask view is available to help you create more detailed animations. Then share your final creation via Facebook, Twitter, or Tumblr.
Echograph — Create Cinemagraph Animated GIFs is available for free for a limited time. It has a 4-star rating with a total of 319 ratings.