source
crt.sh

Certificate Search.

Certificate Ripper

A CLI tool to extract server certificates.

osslsigncode

OpenSSL based Authenticode signing for PE/MSI/Java CAB files.

Testssl.sh

Is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.

TLScan

Scanner to enumerate SSL/TLS encryption protocol support.