Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
Type2phone - Type2Phone: Use your Mac as keyboard for iOS devices
1keyboard - Type on your iPhone, iPad or AppleTV using your Mac keyboard
Unshaky - Dismiss duplicate key hits on MacBook butterfly keyboards
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.
Synergy - Cross-platform software for sharing your mouse and keyboard between multiple computers