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 …
Userify - Userify is a cloud-based SSH key management solution.
AWS Certificate Manager - AWS Certificate Manager from Amazon Web Services (AWS)
Ganymed SSH-2 - Ganymed SSH-2 for Java is a library which implements the SSH-2 protocol in pure Java.
Namecheap SSL Certificates - Namecheap SSL Certificates act as a third-party verification for a website’s security.
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.