One of those apps is Midomi. (which was free at launch).

Apps such as Midomi can help you find a song that you hear on radio, or playing in a bar or if you know the tune and can hum it out.

SoundHound is the newest entry in this ‘What’s that song iPhone app’. SoundHound is available as free version as well as a premium version.

SoundHound’s music recognition is blazing fast! It can recoginize a song in just 4 seconds. It doesn’t matter if it is playing on the radio, or if you sing or hum it.

The free version gives you 5 free IDs per month. Your history and bookmarks stay with you. You can get additional IDs as in-app upgrades or get unlimited ID’s with the premium version.

Here are a few more features in the SoundHound app

• In-app lyrics
• Fantastic music discovery
• Artist top songs with visual popularity
• Instant sharing over email, Facebook or Twitter.
• Pandora station links
• One tap purchase with iTunes
• Playback of your iPod tracks & playlists – with SoundHound lyrics
• Music browsing with bios, in-app YouTube videos, discography and tour dates
• Instant voice search to take you straight into any song or arttist

SoundHound stands out from other ‘what’s the song’ apps in working as a iPod app replacement. SoundHound can play your iPod tracks and playlists while giving you the lyrics. This is absolutely great!

With the iPhone OS 4.0 giving more access to iPod app, I am looking forward to making SoundHound my default music player.

A must have in any music-lover’s iPhone.

SoundHound for iPad is also available.

Screenshots

Rating: 4.5 stars out of 5 stars

Availability: App Store

Price: Free and $4.99

AirBand is an iPhone app from the Music service provider – MP3Tunes.com.

Mp3Tunes provides everyone a free 2GB locker account (or an ad-free paid premium account) where you can store your music and video files and access them anywhere you have an Internet connection.

On the iPhone, you can access your Mp3Tunes Locker files with the free AirBand iPhone app.

You can upload files to your MP3Tunes locker account in one of many ways

• Use the web interface to upload files
• Use LockerSync software to mass upload files from your desktop (like Dropbox again). You can also schedule syncs to run on certain intervals. It works on Windows, Mac and Linux.
• If you install the browser plugins, you can easily add music to your locker right from the pages you are browsing.
• Mp3tunes comes with an open API which means other apps can di into your locker to play your files. For ex. Amarok, PS3MusicPlayer, WiiTunes can access your locker and play your files.

AirBand iPhone App

The app is pretty simple and functional to use. You login with your MP3Tunes.com account and you will be presented with a few tabs.

• Artists
• Albums
• Playlists
• Settings

It is pretty straightforward and the player screen looks pretty neat to. I am not sure I like the volume dial even though it looks cool.

You can also set the audio streaming quality depending on your connection.

I just briefly tried this app with one song and it performed well on 3G as well as EDGE connection.

With Apple purchasing Lala and the popular opinion that we will have our iTunes in the cloud, Airband could give that ability right now to take your music in the Cloud with you.

With the free 2GB Mp3Tunes account, you can free up your Dropbox account from music. I know I did!

Screenshots

Rating: 4 out of 5 stars

Availability: App Store [iTunes link]

Price: Free

Their latest release of iTrip FM Transmitter is really special for iPhone and iPod Touch users.

First let’s see what iTrip FM Transmitter offers

• One-touch setup and tuning with SmartScan – finds the best available frequency for you
• SmartSound technology auto-adjusts signal strength for each frequency
• Bright back-lit display for easy viewing in all conditions
• Micro-USB connector to charge while you are playing
• Track Controls from iTrip display
• RDS support to display artist and track information on RDS-enabled radios

iTrip is retailing at $49.99 at the moment in Griffin’s website.

iTrip Controller App

iTrip has released a free iTrip Controller app in App Store. It lets you take full advantage of your iPhone or iPod Touch’s multi-touch display.

You can tune, scan or access up to 3 preset stations for your iTrip.

iTrip Controller App should work for any iTrip models released after Sep 2009 so it would just this one at the moment.

At $49.99, iTrip is a little expensive among other FM Transmitters like this one. But, it does bring some of original Griffin technology like SmartScan and SmartSound that promises to make this a more fun experience for the customer.

Once this hits the online retailers like Amazon, the price is bound to be more appealing and I will update this post.