The new generation of smartphones, realistically, should be call appPhones. They are no longer defined as being 'smart' (they are all equally smart), but they set themselves apart by having a thriving apps ecosystem (or, trying to do so).
As such, most iPhone or Android users have a favorite set of apps they use either daily, for distraction, or for occasional utility - some even just for goofing off.
Here's for a starter, my list of my favorite apps on my iPhone right now. What's on your appPhone?
Acrobits Softphone : configured for my home VOIP pbx system, it extends my extension to iPhone, and allows me to place VOIP calls from anywhere via my own system, appearing to come from my home number. Plus, outgoing calls are 1 cent a minute.
TRUphone : similar to the above, but a more commercial product. Top up your account, and make calls at 6 cents a minute to most countries. I used that one before I found Softphone above.
Pandora Radio : Internet radio, your way. Pick an artist, or a style, and Pandora will play just your style of music. Rare commercials, which you can eliminate by subscribing. Once iOS 4 is released, will be multitasking supported, so can listen to Pandora while doing anything else, playing in the background.
Pro HDR : Let's you take two pictures with iPhone, one dark and one bright, and combine them into an HDR (High Dynamic Range) picture. Properly applied, brings out can make your pictures snap nicely.
VideoPano : usually, creating a panorama requires taking a bunch of still, making sure they are aligned with overlap, to make it fit. VideoPanorama makes it easy - just take a video while sweeping over the scene left to right, and the app does the rest.
AutoStitch : same thing, except you can take a bunch of stills, and just make sure they kinda overlap. The app takes care of the rest, matching overlaping features in the scene. The final panoramas are higher resolution than the VideoPanorama.
ShakeItPhoto : remember Polaroid. Snap, Zzzzzzzswish, and shake it to develop the picture? This simulates that experience, down to the classic dynamic range and colors of the Polaroid.
Pac Man : yep, that same Namco game, classic of the 80s. iPad version too.
Pocket God : perfectly cute waste of time. 99 cents well spent.
Beejive IM : Multi-account and multi-protocol IM client. One of the best. Pricey at $10, but works flawlessly, and well worth it, to me.
Comic Touch : Take a picture. Add a comic bubble with text. Presto, you're in the comics.
Pocket Universe : point your camera at the sky, pUniverse will tell you what you're looking at, as you sweep across the sky, the view changes dynamically. Compass and accelerometer, and GPS aware.
SoundHound : Hearing a song on the radio, or a café's music system? Hold SoundHound up to it, and it will tell you what song it is.
WikiTude : Augmented Reality, move your camera around, and it will show you points of interest from wikipedia, overlaid over the video view of your surroundings. Surprisingly works well in many places.