Type2phone - Type2Phone: Use your Mac as keyboard for iOS devices
1keyboard - Type on your iPhone, iPad or AppleTV using your Mac keyboard
Mocha Keyboard - Mocha Keyboard is a leading Bluetooth keyboard application for iPad, iPhone, and iPod touch.
Unshaky - Dismiss duplicate key hits on MacBook butterfly keyboards
KeyWi - Use your computer's keyboard to type on your iPhone or iPad
across - Across makes a Bluetooth equipped PC or Mac work as a standard Bluetooth keyboard/mouse combo.