I recently purchased an iPhone 3G and so far it’s been a pleasure. As you all know it’s a phone/iPod/internet/email device so I won’t dwell on those features. I would like to point out a couple of Apps that have incredibly useful functionality.

Simplify Media is a free app for the iPhone that allows you to stream your entire iTunes library over WiFi, 3G, or even EDGE. You need an account with Simplify and the desktop version of the software (both of which are free) and you’re ready to take your full music catalog almost anywhere you get cell phone coverage. So far I’ve only used it over WiFi and 3G but it was quite quick even while in a moving car!

AirMe is another free app that uses the iPhones built-in 2 MegaPixel camera to snap a photo, geo-tag it, and upload it immediately to flickr or Facebook. I’ve been using this quite a bit and it works flawlessly. It’s really great for capturing the moment when I don’t want to lug my Rebel around.

Things is a productivity app for keeping track of, well, things. It allows you to put objectives into Projects, ongoing Areas, or just a general ToDo list. I won’t go into all the features (too many to explain here) as their website provides an ample description. Available for the desktop as well and has a nice WiFi sync capability.

I hadn’t heard about any of these apps before I got my iPhone a week ago and it was a pleasant surprise to get all this additional functionality for free. I’d love to hear about the apps that you’ve found useful.