The iPhone 3G is a great handheld, but would be almost useless without it’s applications. This is the reason we tested a lot of applications and came up with this list of 47. We might have miss some applications, so please tell us about any interesting applications you know in comments.

1. Yahoo! Maps

Lately, virtual maps made a lot of fuss and because many need them while not in front of the PC, MB Dragan designed a very clean and useful iPhone optimized website that uses Yahoo! Maps API.

2. Powerset Wikipedia Search

Powerset created a web-based tool that allows you to search Wikipedia easier, by keywords, phrases or questions. Also it can grab for you infortmations from more articles to answers your question. A great tool to use anytime you have a doubt about something, wherever you are, being optimized for iPhone.

3.iConvert

iConvert is a simple tool that helps you convert literally all measurement units used nowadays all over the world. It has simple and clean design, being very easy to use. Just write the value in the measurement unit you want to convert and it will automatically convert it in all other.

4. MoneyShuffle

MoneyShuffle is a simple exchange rate calculator, with more than 150 currencies included. All you need to do it enter the value, choose the currency you want to exchange from and the one you want to exchange into.

5. Revision3 Mobile

Revision3 Mobile is the iPhone optimized version of the popular web TV network. It offers users the possibility to share, search and receive notification of videos.

6. Tour Volume

Search for concerts by club, ban, city or state or listen to the artists directly on your iPhone. Also you can map and call venues thanks to Tour Volume.

7. Random Fun Ideas

Bored ? Visit this website to get a fun idea of what to do or share your ideas with others directly from your iPhone.

8. ViralBabble

An aggregator of social media, tech news, gaming news, videos and photos. Find out everything that’s hot at the moment.

9. Podcaster

Podcaster is an easy to use iPhone optimized website, where you can listen to over 5,000 podcasts from it’s directory. Also you have the possibility to add your own podcast feed.

10. AOL TV Listings

A great tool where you can find your favorites TV shows, movies sorted by date and read details. You can also jump to dates, times and browse by category.

12. iFeeder

This software allows you to add, remove and view your feeds directly on your iPhone. You can also keep track of the feeds you read and you will always know what the ones you haven’t read yet.

13. IMDB Client

This tool helps you find movies, actors, characters and trailers that can be viewed on iPhone. It has a lot of useful features, like a news feed, tribia, Goofs, Soundtracks, Quotes and Crazy credits.

14. Get all the news!

Get all the news is a simple RSS reader that gets latest headlines from the most popular newspapers.

15. Digg Application

The Digg iPhone application get Digg’s front page directly on your iPhone, in a simplified style, with top comments and pagination options. You can also login or jump to any topic you want.

16. iNews

iNews is a small application that allows you to search the latest news from Google and Yahoo. Being extremely simple, it has no other feature than that.

17. Remember The Milk

Remember The Milk is an advanced task manager where you can add and edit task and notes, complete tasks, view tasks upcoming today, tomorrow or this week, sort tasks by location, tag or list. It also offer a search functions for your tasks.

18. BudgetBuster

This software helps you keep track of your daily, weekly or monthly budget. Enter your maximum budget and then the spendings, everytime you buy or pay something. You will also have an unlimited expense history, so you can set goals and keep a better track of your budget.

19. Livetimer

LiveTimer is a flexible and accurate time tracking application, that can prove useful in many situations. You can track your time while working or enter working hours by day or week. It can track time down to minutes and helps you see gaps, so you can maximize your efficiency and productivity.

20. Readdle

Readdle is an online tool that allows you to upload your own documents and then open them from your iPhone. It suppors a lot of formats, including TXT, PDF, MS Word and MS Excel, providing 50MB of free storage space for every member. Users can create a private bookshelf from their own documents or can visit the public bookshelf of classics, accessible even for unregistered users.

21. TouchMail

TouchMail is a webmail client that supports 5 most popular email services ( Yahoo, Gmail, Hotmail, AOL and Lycos ). You only need to create an account and add your email accounts into it. After that, you can check all your email addresses at once.

22. Google Docs

Access your documents from any location, directly from your iPhone. Your documents are stored on Google’s servers and shown to you in an iPhone optimize page.

23. Tabulate

This simple Safari Bookmarklet offer you the possibility to open a link in a new tab or the current tab. You can also make Tabulate remember how to open that link next time.

24. Bulletin Mail

This software grabs your email from all your accounts and it supports internet email, ISP email and Corporate email. It monitors your email and grabs your email as it reaches your account. Then, Bulletin Mail sends the email to your phone. You can choose only to send you the emails that are important to you, using the filtering option. Also, you can reply or forward every message.

25. Amazon Search

This tool helps you search Amazon directly from your iPhone and it includes many stores, like the US, UK, Germany, Canada, France and Australia.

26. Photo Tags

Search for the latest photos on Flickr, based on a combination of tags. You can view and slideshow the photos and manage your tags for a easier search.

27. PhoneFavs

PhoneFavs is an online mobile bookmarking service that lets you bookmark, view your and others bookmarks directly from your iPhone. It also features an import tool from Safari, Internet Explorer, Firefox and del.icio.us, along with search utilities, website directory and a mobile web transcoder, that helps you view large web pages on your iPhone.

28. Google Search

Search Google easily thanks to this optimized page. You can access images, sports and weather, along with local listings and business.

29. Picasa Mobile

Access your online album, optimized for smaller displays, with smaller pictures that can fit your screen and can be downloaded fast. Also you can access your Favorites, search photos from your albums, friends or the online community.

30. tumblr iPostr

An Ajax based platform that allows users to post five types of content ( text, photo, quote, link, and chat ). They can also view what they posted, use advanced options, like date, public or private, tags or posting code format. It has almost all features of the original website.

31. IM+ for Skype

IM+ for Skype allows users to call or chat via text with other Skype users to their PCs, make cheap calls to any destination, directly from their iPhone.

32. Twitter for iPhone

A Twitter client has has all the features, a clean design and loads very fast. It looks mostly like Twitter and you won’t even notice you are Tweeting from the iPhone and not from the PC.

33. Remote Desktop for Mobiles

RDM+ (Remote Desktop for Mobiles) is an application that allows you to access and control everything stored on the hard drive from your home desktop. With it, you can move or edit files, launch programs or use network resources just like you’re at your place.

34. HyperOffice

Your iPhone office, gathering informations about business contacts, possibilities of accessing your Outlook mail and calendar and sharing all the data with your co-workers. Documents are also shareable.

35. Wallpaper

This is a community for the iPhone users that makes everyone’s wallpaper visible to others. Not only that the members can browse each other’s pictures, but they can also download them or leave comments to each pic.

36. Customize

Every single icon can be accustomed to your preferences. Either you don’t like the power, edge or even the battery icon, you can change them all. More and more image packs and themes are released every day, so you have plenty to choose from.

37. MxTube

Got favourite videos on YouTube that you’d just want to watch them over and over again? Staying connected most of the time could come a bit pricy. This tool downloads any videos from YouTube, so you don’t have to be online while watching them.

38. iPhone SpeedTest

Test your iPhone’s network connection and take a peek at the speed tests of others. So far, the average speed for the tested devices is somewhere around 3300 kbps.

39. Rubik’s Cube

One of the most popular games of all times built into a game application that should keep you as busy as its real model. Great for those who often get bored at work.

40. MyMetar

This ‘weather bookmarking service’, as its owners describe it, allows you to bookmark your favourite TAFs and METARs so that you’ll never be surprised again by bad weather, wherever you go.

41. iPling

iPling is a social networkfor iPhone users that connects you with people with similar interests and encourages meetings in real life. If you like blind dates, this is for you.

42. Expense View

This application could really help you get more organized regarding the way you manage your finances. When you’re out shopping, you can input informations about the products you bought and their prices here. Get back home at your desktop and check where did your money go. You can separate the costs into categories and get a chart to realize where you should tie the belt and save some money.

43. Talkster

This may come as a small shock, but it allows you to have completely free group conferences, long distance and international calls from your iPhone. To use it, you access their website, enter your name and the phone number you want to call, and they send you a SMS with a local phone number. Then you tell your friend to call you at that number.

44. Finger Scan

Impressing someone just got easier with this entertainment feature. It has a fingerprint authentication system that simulates a finger scanner, so it’ll be a funny thing to carry it around and act as a detective.

45. Reverse Cell Phone Lookup

If you’re into hacking or phreaking, this little piece of software should make your day. By simply typing a phone number in a search box, you get the owners details. Information such as name, address, line details and carrier information has never been easier to get.

46. TxtDrop

Unlimited text messages from your iPhone, and all cost-free. Just type in your email, the recipient and the message to be sent. Very handy when you’re in a rush, as it’s quite simple to use.

47. Mobifindr

Mobifindr helps you keep track of your iPhone’s location at all times. Either you lost it, or it was stolen, all you need to do is to text it from another phone, and Mobifindr will deal with the rest. You will shortly receive a message with its location via AGPS.