If you’ve been lucky enough to receive an iPhone 4 for Christmas, then you need to start downloading apps for it right now!  We’ve got two sets of 10 for you here, the first covering a general set of applications which every iPhone 4 owner would benefit from, and the second set suggesting ten apps for more specific needs.

For All Users:

1. Twitter/Facebook.  The official applications for the well-known social networks.  There are many Twitter alternatives, so don’t be afraid to give them all a try, but for Facebook, the official version remains our favorite.  Free.
2. Skype. Chances are you use this on your desktop machine already, and the iPhone version is equally as helpful.  Free.
3. Infinity Blade. The definitive iPhone game in terms of graphical achievement, and thankfully the game itself is great too!  Read our review here.  $5.99/£3.49.
4. EverNote.  An incredibly complete app for storing ideas, notes, photos and even audio.  You will have to pay a monthly or yearly fee to unlock some features though.  Free.
5. Zinio. Read many of your favorite magazines on the move, via your iPhone or you iPad with this great application.  Magazines are downloaded in-app, and are identical to their print editions.  Free.
6. Reckless Racing. Our current favorite racing game, with great graphics and lots of oversteer.  Read our review here.  Check out Real Racing 2 if you’re after a more realistic driving game.  $0.99/£0.59.
7. Google/Bing. Much more than a simple search app, each offers many bonuses including Google Goggles, voice search, maps and a barcode scanner.  Free.
8. iBooks. It’s Apple’s own eBook store.  Free.
9. Angry Birds. More of a phenomenon than a simple game, this is arcade gaming at its best.  Don’t forget Angry Birds Seasons!  $0.99/£0.59.
10. MultiConvert. Convert just about anything, from time to weight to currency.  Free.

Want Something Specific?

1. Skyfire. Frustrated because you can’t watch Flash video?  Skyfire’s alternative web browser solves your dilemma.  $2.99/£1.79.
2. Instapaper. Save interesting web pages and articles for reading later, on or offline.  The app then formats them for your device and removes ads and other distractions.  $4.99/£2.99.
3. R-Type. Still one of the very best sideways-scrolling shoot ‘em ups, and a fantastic arcade conversion too.  Read our review here.  $0.99/£0.59.
4. FlightTrack Pro. Do you travel a lot?  Organize and manage yours, or someone else’s, flights with this impressive application.  Read our review here.  $9.99/£5.99.
5. Documents To Go. Create and edit Word and Excel files, plus view PowerPoint documents and PDF files.  $9.99/£5.99.
6. Ocarina. The original musical app for the iPhone, and it’s still breathtakingly brilliant today.  $0.99/£0.59.
7. Kindle. One of the many eBook readers for the iPhone/iPad.  If you already use Amazon for your eBooks, you’ll be wanting this app.  Also consider Kobo and Stanza.  Free.
8. Air Display. It’s quite pricey, but you get what you pay for.  This app turns your iPhone or iPad into a wireless, extra display for your desktop computer.  Read our review here.  $9.99/£5.99.
9. Qwak. Enjoy a good platform game?  Qwak is still a brilliant example of a touch control system working well on a platform game, plus it’s huge fun to play!  Read our review here.  $2.99/£1.79.
10. Reeder.  If you use Google Reader, then this is one of the best Reader clients for the iPhone.  $2.99/£1.79.

Hopefully that has given new iPhone owners a few ideas!  If you’re an existing user and have an application you think a newcomer should download, then let us know in the comments!