Status Page On Demand | Gatus
https://gatus.io/
Gatus was made to monitor everything, in every possible way. HTTP, GraphQL, DNS, ICMP/PING, TCP, certificate expiration, you name it. While checking the response status may be enough for some use cases, Gatus goes much further and allows you to add conditions on the response time, the response body and even the IP address.
Canary
http://www.canary.io/
Canary is a distributed HTTP measurement network that is built upon open source components and produces open data
Canary
http://www.canary.io
Canary is a distributed HTTP measurement network that is built upon open source components and produces open data
Justniffer
http://justniffer.sourceforge.net
"justniffer is a tcp packet sniffer. It can log network traffic in a 'standard' (web server like) or in a customized way. It can also log response times, useful for tracking network services performances (e.g. web server, application server, etc.)."
Social Media Monitoring Tools for PR Professionals – Radian6
http://www.radian6.com/cms/home