Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
1keyboard - Type on your iPhone, iPad or AppleTV using your Mac keyboard
KeyWi - Use your computer's keyboard to type on your iPhone or iPad
Synergy - Cross-platform software for sharing your mouse and keyboard between multiple computers
Mocha Keyboard - Mocha Keyboard is a leading Bluetooth keyboard application for iPad, iPhone, and iPod touch.
ShareMouse - With its easy setup and high level of versatility, ShareMouse is a great tool if you're looking to use a single mouse and keyboard across multiple computers.