Bag
iMessage
Mac OS X: imessage://<your apple id> e.g. <a href="imessage://[email protected]">Send iMessage to a Mac</a> iOS: sms://<your apple id> e.g. <a href="sms://[email protected]">Send iMessage to iOS</a>
FaceTime
facetime://appleid facetime://email@address facetime://phonenumber