SSLCertScanner is the FREE SSL Certificate Scanner tool which can help you to remotely scan, retrieve and validate the SSL certificate from any SSL Server. It can greatly help you to track expired/rogue certificate on your SSL servers.
You can either specify IP Address or hostname of your SSL Server. Now with version 3.0 onwards you can specify custom SSL Port number which is useful if your SSL Server is running on non-standard port. On success, you can view the certificate details including issue date, expiry date etc.
If you are looking more advanced features then check out the Enterprise edition – NetCertScanner
For more details and download, visit SSLCertScanner