MultiRemote!

Touch Mouse by Logitech turns your iPhone or iPod touch into a wireless trackpad and keyboard for your computer.

Ultimate Control is a set of software tools that allow you to take control of your computer wirelessly.

Mobile Air Mouse instantly transforms your mobile device into a motion-based mouse, trackpad, and wireless remote for your computer! It uses the built-in accelerometer to translate your hand motions into mouse movements on your screen. It can also operate as a trackpad remote, allowing you to control your computer with a single finger. Mobile Air Mouse uses an innovative application notification system to let the iPhone know what program you are running at any time and show the appropriate keys for that program. This allows Mobile Air Mouse to provide a single screen remote for controlling ALL your media and web applications. »

XBMC Remote gives you complete control of XBMC via your iPhone.

Boxee Remote turns your iPhone into a remote control for the Boxee media center. It connects to Boxee over WiFi and has two modes: Gesture Mode and Buttons Mode.

Transform your iPhone, iPad or iPod touch to remotely control you computer through WiFi. Extended keyboard, Multi-Touch Trackpad and Apple Remote.