Celsius
Celsius is a utilitarian weather app with a nifty twist: it displays the current temperature outside as a badge of the app icon-so you don’t have to open the app to have a quick look at the weather. The app is universal (iPhone+iPad).
WhatsApp Messenger
Until iMessage arrives with iOS5 this fall, WhatsApp can send text, group, video, audio, and photo messages not only to other iPhone uses, but also on Android, BlackBerry and Nokia phones too.
Pimp Your Screen
Customize your iPhone and iPad to your liking with an endless resource of backgrounds, including some cool app shelves and icon skins, for both older and newer models with Retina screens.
Camera +
As the name suggests, Camera+ is an advanced app for your iPhone, with tons of extra features including, stabilizers, grids, exposure and focus control, editing features and multiple effects.
Doodle Jump
The classic game is now updated with a fun multiplayer mode, where you have to race against your friends to the top of a level. The game is also frequently updated with new levels and goodies, with over 30 to date.
Shine
A sleek replacement to Apple’s Weather app, Sine keeps it simple by only displaying what you need to see. There are advanced features too, with 7-day, 72-hour forecasts and multiple saved locations.
Angry Birds
If there’s one $0.99 game you have to have, then it’s the worldwide phenomenon Angry Birds. The paid version gives you 240 levels (more added with each update) with lots of angry birds seeking revenge from the green piglets.
Tiny Wings
Still in the bird games category, but not as angry, Tiny Wings is a one-touch arcade game where you guide a bird with tiny wings to fly by sliding across hills. The game world changes on a daily basis with new backgrounds and graphics.
Top 100
For your buck, Top 100 lists the top album and single charts from around the world. You can listen to any full songs from the listings, as well as watch the music videos.
The Heist
A challenging puzzle game, The Heist adds another layer of fun to the action. Those who crack the final puzzle will win a secret prize from the company behind MacHeist, popular for selling Mac software bundles at discount prices.