Messaging from desktop Is there something besides Moto Connect and Mighty text that would allow you to SMS/MMS from the desktop.  Mac or PC.  I came from a iOS world where iMessaging worked really well for the desktop.  Hangouts is close, but I message a lot people with iPhones so it just doesn't cover enough people.  

Any suggestions?
This sounds a lot to me like a sort of push notification system. The way I have implement this into my own foot print is to use growl/libnotify on the desktop and notify my android which allows me to have a central cloud based datastore for my alerts.

There is also the option of just emailing all your devices/contacts instead. One can find a Email To SMS Email Address List which lists the domains you would need to send a message to for your SMS/MMS communication to be transmitted.