OpenSSL - OpenSSL is a free and open source software cryptography library that implements both the Secure Sockets Layer (SSL) and the Transport Layer Security (TLS) protocols, which are primarily used to provide secure communications between web browsers and …
SecureBridge - Сlient and server components for SSH, SFTP, FTPS, SSL, HTTP/HTTPS, WebSocket, and SignalR protocols
SSL.com - SSL.com is one of the most trusted certificate authorities that expands boundaries of encryption and data authentication relied upon by many worldwide users.
FireSSH - After 13 years and 25 million downloads later, Firefox has officially removed FireFTP and FireSSH support from the browser. Thus, I've ended support / development of the addons. I recommend switching to Waterfox to continue using the addons.
GeoTrust SSL - The SSL Store™ offers 70% Off On GeoTrust SSL Certificates, including Free Site Seal. Buy GeoTrust CA SSL and get 256 bit encryption web security now.
Userify - Userify is a cloud-based SSH key management solution.