Free apps of Apple

PhotoSynth

We did a bit of a double-take on seeing Microsoft's name attached to this, not least given the lack of a price-tag. But PhotoSynth is a really great panorama app; it's user-friendly and fun to use, especially when watching your panoramas take shape while you capture them.

RunKeeper

The prospect of Nike+ but better and for free might sound unlikely, but that's what RunKeeper provides. Previously split into 'pro' and 'free' versions, the developer now generously includes all the features in one free app.
That means you can spend no money, yet use your iPhone's GPS capabilities to track your jogging and cycling routes, and examine mapping and details of your pace and calories burned. Activities can be shared online, and treadmill runs and other exercise details can be entered manually.

Dropbox

Plenty of apps exist for transferring content between your computer and your device, but Dropbox is free and easier to use than most of its contemporaries. Dump files you want to sync in a folder on your computer and Dropbox for your device will enable you to access them, download them for offline viewing, and, in many cases, view them.

TonePad

Virtual pianos and guitars are all very well, but purely digital musical toys are more suited to Apple handhelds. TonePad is the best of them, using a grid-based interface that enables you to turn notes on and off and compose pleasing and harmonious loops; your creations can be edited, saved and uploaded to share with other users.

Comics

In all honesty, Comics is a little awkward compared to using it on an iPad, but you won't find a better comics experience on an iPhone. The app is free, as are dozens of downloadable comics - and once you run out of those, many more are available to buy. Reading works on a frame-by-frame automated 'zoom' basis, and is surprisingly usable.

Wikipanion

The Wikipedia website works fine on iPhones, but a dedicated app is a better bet. Wikipanion is a freebie which gives you quick access to article sections, in-article search, viewing options, bookmarking, and the ability to tweet about whatever odd fact you've just unearthed. Also, wonderfully, there are no ads.

Around Me

Around Me figures out where you are and lists local stuff - banks, bars, petrol stations and, er, Apple Retail Stores. The app's reliance on Google Maps info means there are gaps, but it's nonetheless handy to have installed when in unfamiliar surroundings, and the 'augmented reality' landscape mode is amusing, if flaky.

Adobe Photoshop Express

If you're looking for Photoshop-style power, Photoshop Express won't impress. However, if you're after a quick, free, highly usable tool for making edits to your iPhone photos, Adobe's app is ideal. Use it for cropping, straightening, exposure adjustments, colour effects, sharpening and more.

iHandy Level Free

One of the tools from the excellent iHandy Carpenter toolkit app, iHandy Level Free turns your iPhone into a spirit level. By default, it'll show just how wonky your device's accelerometer is, but tap the calibrate button and you get an accurate and great-looking level.

Red Laser

The Red Laser bar-code scanner is pretty accurate, even if you're still saddled with an iPhone 3G. It's great for checking prices while shopping, and also enables you to get your media collections into Delicious Library if you make use of AppleScript.

Google Earth

"Hold the world in the palm of your hand," says Google about Google Earth, which enables you to fly across the planet by swiping your finger. More integration with content and features from Maps would be good, but Google Earth's Wikipedia articles and a Panoramio layer at least ensure it's a great app for seeing the world from your living room.

Shazam

Shazam is an app that feels like magic when you first use it. It's deceptively simple—hold your iPhone near to a music source, and wait while the app listens and tells you what track is playing. But the sheer technology behind this simplicity is mind-boggling, and while Shazam doesn't always guess right, it's worth a download.

Dragon Dictation

Fed up of typing on the tiny iPhone keyboard? Use Dragon Dictation instead, which happily converts your speech into text (with slightly spooky levels of accuracy for a freebie app). You can even punctuate ("Comma! Full-stop!"), and when you're done the app enables you to fire your thoughts at Facebook, Twitter, Mail or the iOS clipboard.

iHandy Torch Free

It's a torch! It's a cheesy neon light! It's a hypnotic spiral effect! With slightly annoying ads! (In reality, iHandy Torch Free is a mostly a handy app to have installed in case you get up for a midnight snack or toilet visit, don't turn on the light and want to avoid smashing your toe annoyingly hard into an unruly cupboard.)

IM+

If you're an instant messaging fiend, IM+ gives you access to GTalk, Yahoo, MSN/Live Messenger, AIM/iChat, ICQ, MySpace, Twitter, Facebook, and Jabber. With multitasking and push notifications in iOS 4, IM+ has been transformed from a curiosity into a must-have freebie app.