Onionshare - OnionShare lets you securely and anonymously share a file of any size with someone.
Twilio - Brings voice and messaging to your web and mobile applications.
ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Send Anywhere - Send whatever you want, wherever you want
BulkSMS - SMS messaging service provider offering two-way SMS communication services.