There are a lot of ways to control and access your PC or Mac from your Android device, but the ability to go in the other direction has been sadly underrepresented... until now. Android Police made a great find in AirDroid, an app that hosts a local HTTP server on your phone that any web browser. It's sort of like Motorola's WebTop interface, without using new hardware. And the things you can do with it, not to mention the interface with which you do them, are amazing.
Essentially, AirDroid turns your phone into a local version of one of those web/cloud operating systems that were all the rage a few years ago. Just start the app, connect to your home WiFi network and log in from a local PC browser. You can access all of the files currently stored on your phone, including a full image viewer and streaming music player. You can access, install, and back up all of the apps on your phone, even the system apps that non-rooted users normally don't have access to. You have full access to your Android phone's contacts, call logs and SMS messages. All from a desktop interface that mimics a minimalist Linux distribution.
The best part? It's all free. If you're a power user you must check AirDroid out. Sure, you can do some of this with a standard MicroUSB cable, but the way it's presented and the ease of use is astounding - it'll make showing off your media, plus sharing apps and files so much easier - I only wish there was a way to display full Android apps across the WiFi connector. It's nothing less than a major accomplishment for developer Sand Studio, and I can't wait to see what they do next with this idea. You can download AirDroid from the Android Market right now.