Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
Noizio - Feeling that the noise of the big city is too much for you to bear?
1keyboard - Type on your iPhone, iPad or AppleTV using your Mac keyboard
White Noise - White Noise to help you sleep and games to wake you up.
KeyWi - Use your computer's keyboard to type on your iPhone or iPad