Open-source
pj-net-tools is a Java-based Feature-rich Network Tool
pj-net-tools is a set of useful tools that allows you to test, scan, and monitor your local network. It is built with Java, so it can run basically on any system that contains Java. Tools 1. ICMP-ping 2. ICMP-traceroute 3. DNS-check resolver 4. Host TCP-scanner 5. IP-calculator 6. Syslog-server 7.