Octopush - Octopush is a company providing technology-based communication solutions, including SMS, Web solutions, and Email APIs.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Clearstream - Clearstream is a SMS marketing and online texting software.
Enigmail - Security extension to Mozilla Thunderbird and SeaMonkey
Swift SMS Gateway - SMS Gateway is your bridge between the Internet and the world of cell phone SMS text messaging.
Tutanota - Get your encrypted mailbox for free.