One of the great things about the Apple iPhone is that, aside from its bevy of cool features, web apps will continue expand the phone's capabilities still further. They're basically mini web pages designed for the iPhone's 3.5-inch screen, which not only offer a bit of fun, but also extra functionality.

You can add shortcut icons to these apps to the iPhone's home screen.

For instance, if you were to visit Facebook in the Safari browser on your iPhone, you'd be scrolling horizontally a lot because Facebook has very large pages designed for PC screens. But if you install the Facebook app to your iPhone, it'll present the site in a compact way designed especially for the iPhone.

Here's a round-up of the best, and the most popular apps, currently available for the Apple iPhone.

10. Marq

Currently one of the most popular apps on the Apple site, this app scrolls marquee-style messages across your iPhone's screen. Handy for all those times when you're sitting in a quiet office and want to have a bit of fun with the person sitting opposite you. It may be just for fun, but people seem to love it.

9. Signal

This handy application turns your iPhone into a wireless remote control for iTunes on your Mac or PC. So for those times when you're sitting at home listening to music, instead of returning to your computer every time you want to alter volume or switch tracks, you can do it on your iPhone via Wi-Fi. It works with Windows Media Player and Winamp too.

8. Tomatometer

If you're going to watch a movie at the cinema, you can use this app to see if your film of choice is any good before you pay to see it. It uses the Rotten Tomatoes reviews database. Fairly basic really, just search and you'll see scores out of five as well as links to reviews.

7. Digg iPhone Application

Another basic one this, it's pretty self explanatory. This app offers a reformatted version of the Digg homepage so that it's easier to navigate on your iPhone.

6. iTetris

Everyone loves Tetris. And this is a basic version of the game which is designed especially for the iPhone. It's just one of many other mini iPhone games that are available, including Bejeweled, Hangman and many more.

5. Google Calendar

The great thing about Google Calendar is that you can access your schedule from any PC or Mac which has a web connection. But what about when you're on the move? This one will link you directly to your Google Calendar so you'll never forget a meeting or a birthday.

4. YouTube

This one will already be on your iPhone when you fire it up. When you're having an argument with a friend in the pub about whether Han Solo shot first or not, what can be more satisfying that pulling out your iPhone, loading up YouTube and proving that you're right?

3. Yellow Pages

What do you do if you're in town and you need to find out where your local Apple Store is? Open the Yellow Pages app, enter your search term and within seconds you'll have the address and contact details of all the stores in your area.

2. Google Search

This one does exactly what it says on the tin. Once its on your home screen, one click will navigate your way through to a Google search page designed specifically for the iPhone. Type in your search term and results are displayed in a neat list with minimal adds.

1. Facebook

Facebook is the site everyone's talking about. And this app enables you to keep in touch with your Facebook account without having to cope with enormous pages. Update your status, change your profile picture or just browse your news feed. If you've got an iPhone, and you use Facebook, you need this app.