Today is iPhone 3GS launch day. So, you’ve probably picked up your new shiny device and are wondering what wonderful productive and time-wasting apps you can download to fill it to it’s capacity. Let me help you.

Here’s a list of some must-have apps, for every iPhone user.

Tweetie [iTunes] : If you have a twitter account then you need this. Don’t try or buy the others because like me you’ll only regret having spent more than you need to: Tweetie does it all with a beautiful and uncluttered interface. The best twitter app bar_none. Great price of £1.79 to boot. Tweetie for Mac is also available.

Shazam [iTunes] : The gem of the app store if you are a music lover. How many times has that DJ played a song on the radio and doesn’t mention who the artist is? For me Shazam is a DJ in my pocket – he knows pretty much all there is to know about every song ever made, almost! If you hear a song on the radio and don’t want to take a chance on waiting to see who’s behind it, just fire up Shazam, point it to the speakers and press Tag Now. It will listen to the song, send it, analyze it and bring you back the results with name of the artist and track. There are rare occasions where the results come back as unrecognised, but 99 times out of 100 it does it’s job. And it’s free.

QuickPigeon [iTunes] : This is a new app for me and I have yet to see whether it can be something I will use regularly, but is an awesome idea which is what gets it on my list – along with the fact it has push notifications especially for iPhone OS 3.0. Say you want to ask a friend something which requires a Yes or No answer, such as “Coffee at 1?”. You fire up QuickPigeon, ask the question, pick ‘members’ (that’s people in your address book) click on their e-mail address and then it will send that question to them via HTML e-mail and when they hit the Yes or No button then it will send that notification straight back to you, like so…

quickpigeon.jpg

If I can get my other iPhone friends to install this (hint hint), which is absolutely free, then I could see this proving handier and much quicker than going into Mail app to ask a simple question. You can watch a video demonstrating it’s usefulness here.

Peggle [iTunes] : After reading a review of Peggle and then downloading the trial version for the Mac, it was 10 minutes in before I bought this for the iPhone. A wonderfully addictive game which just keeps you going back if you fail to get through a game. I completed the Adventure in around a week and now I’m desperate for Peggle 2. If you aren’t entirely sure what Peggle is all about, like I was, then I recommend downloading the Mac or PC version so you can get the hang of it. Peggle costs £2.99 in the app store.

Chop Sushi [iTunes] : From one addictive game to another. I’m on my second round of the Adventure stage and this game NEVER gets old. Great music, great colourful graphics and characters. Tom wrote an indepth review of this game over at tomacintosh.com, complete with screenshots. Priced at £1.79 for the full version with Lite version also now available to try it out.

Convertbot [iTunes] : Aside from this being one useful little app for converting everything from currency, length, speed, temperature and more, Converbot has a beautiful sleek interface. An app just to fire up for it’s sounds and UI. Thankfully this app has beauty and brains for just £1.19.

Paper Toss [iTunes] : if you’ve ever sat in the office bored, rolled up a piece of paper and see if you can throw it into the nearest rubbish bin then this is for you. Strangely addictive – and free.

FStream [iTunes] : Great app for listening to radio stations on your iPhone – even the BBC stations. Read my indepth review here.

IM+ [iTunes] : Now, I’m not the biggest IM-er in the world admittedly. Infact I can count on two fingers the amount of times I’ve opened iChat this year. But, it’s good to be prepared for any eventuality and IM+ is the nicest Instant Messaging app for the iPhone. I grabbed this for the sale price of £2.99 earlier in the year and at the time of writing it’s at the sale price of £3.49. This has push notifications, so is OS 3.0 compatible.

SKY News [iTunes] : I was pleased to finally see an app for SKY News for the iPhone as it’s the news channel I tend to watch. Excellent app with Top Stories, UK News, Sport, Business News and more. Also includes a video section and ‘Your Report’ so you can snap a photo of a potential newsworthy story and send it directly to SKY News from the app.

Instapaper [iTunes] : With Tweetie having Instapaper integration so I can save links my contacts have tweetes to look at another time, Instapaper Free is a great solution for me. Basically it’s saving web pages for offline reading later. Instapaper for your browser too!

So, those apps should keep you going for a little while. My faves list changes all the time with wonderful new apps being introduced regularly, but the above are with me all the time. Touch Arcade is a great resource for discovering newly released games and price drops of existing games.