OpenSnitch is a GNU/Linux port of the Little Snitch firewall
Tool to ping hosts through firewalls blocking ICMP
Emulator for rapid prototyping of Software Defined Networks
Tool that monitors, analyzes and limits the bandwidth of devices
Basic subnet calculator written in Python.
Monitor SNMP hosts with a sysfs-like filesystem in user-space
Panel Indicator to interact and monitor hosts
Automate Telnet and SSH for Cisco devices.
something that writes code for you