It's time for our weekly look at the more notable and interesting mobile apps being released.

This week, we have the Xbox Companion, an augmented reality zombie game and plenty of other applications.

Xbox Companion

Microsoft's Xbox Companion application first popped up a few months back on Windows Phone 7, letting users control the machine and check their accounts.

However, the iOS version didn't include the control functionality – until now that is. The latest update lets iPhone and iPad users control their machines too, making it ideal for use as a remote control.

Additionally, the app is also available for Android phones, albeit without the all-important control aspect.

Zombies, Run!

There are plenty of games making use of augmented reality right now, with even the Nintendo 3DS and PlayStation Vita getting in on the action.

But one of the best concepts we've seen is 'Zombies, Run!' for Android and iPhone (there's a WP7 version coming at the end of June as well), which charges you with physically running to escape the undead.

At $7.99 on iTunes and R59 on Google Play, it's a pretty steep price, but athletes looking to spice up their runs will definitely have fun with this.

Magic Piano

In what can best be described as Guitar Hero with pianos, Magic Piano is the latest music game to hit the big time.

The application, available for Android and iPhone, sees piano keys light up, with players having to tap them to play the tune. It's all very intuitive, with 13 million players getting in on the action, according to the official app listing.

Magic Piano is available free of charge and includes a variety of pop, rock and movie songs.

Open Garden

This network-focused application has seen plenty of attention in recent weeks, letting users seamlessly connect to the internet via another device.

Of course, almost every smartphone lets you create a WiFi hotspot these days, it's nothing special. But what is special about Open Garden is the ability to create a mesh network, with the app automatically choosing the best connection out of many devices.

Open Garden is available for Android, Windows and Mac, with iOS versions in the pipeline too.

Sonic and Sega All-Stars Racing

Released a few weeks back for the iPhone, Sonic's karting game is well worth a look, boasting online multiplayer and some pretty graphics.

However, the real kicker is the price, being available free of charge for a limited time only. So if you're in dire need of a racing title, you have absolutely nothing to lose.

Pocket Planes

From the same team that brought you the critically acclaimed Tiny Tower (which has since been copied by Zynga) comes Pocket Planes on iOS.

The game charges players with building an aviation empire, starting off with three airports and a few basic aircraft.

However, you'll soon be buying more airports, upgrading your fleet and levelling up, giving you plenty of incentive to spend time with it. And time is all you'll spend, seeing that the game is free-to-play.

Aviary

Initially a plugin for other gallery applications, the Aviary photo editor has been spun off as its own application now however.

This Android and iOS app gives you plenty of options, such as one-touch auto-enhance, crop, rotate, sharpen, blur and more.

The application is free as well, making it a worthwhile alternative to Photoshop and other apps.