Name

URL

Comment

Ping

http://itools.com/tool/just-ping

Online Ping 50 locations

Traceroute

https://traceroute-online.com/

Subnet calculator

http://www.subnet-calculator.com/

SSL/TLS Test

https://www.ssllabs.com/ssltest/

SSL/TLS Test

https://ssl-tools.net/

HTTP headers Test

https://securityheaders.com/

Internet information

https://www.he.net/

Hurricane Internet probing (BGP etc)