WeBe++ is a $5 application that you can download from the Cydia Store via the BigBoss repo. It transforms your iDevice into a Bluetooth mouse and keyboard with all functions and is compatible with any Bluetooth capable device, including Windows & Mac OS X & PS3. It has been tested to work on iPod 2G and 3G, and all iPhones/iPads running iOS 3.0 and up.

Features:

• Windows & Mac OS X & PS3 (or any Bluetooth capable device).
• WiFi, Bluetooth, USB.
• Touchpad (full screen, portrait & landscape mode).
• Keyboard (portrait & landscape mode).
• Move mouse pointer.
• Left click, right click, double-click, horizonal / vertical scrolling.
• Choose a background image or color as mousepad – especially on Retina Display!
• Adjust mouse speed.
• Use WeBe++ in Bluetooth HID mode (recommended) or with the WeBe Server (WiFi (adhoc or router), Apple Bluetooth tethering, or USB).
• Supports multiple-screen configuration of host computer.
• Keyboard supports eleven keyboard layouts: Dvorak, US English, French, German, Swiss German, Swiss French, Hebrew, Hungarian, Korean, Japanese, and Swedish.

Source [FSM]