testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.

This package provides a tool for photo effects like hue shifting and selective color adjustments.

This is an easy to use CLI (command-line interface) tool suitable for direct use or cron jobs.

maim (make image) takes screenshots of your desktop. It has options to take only a region, and relies on another program called slop to query the user for regions using the graphical interface.

Scapy is a powerful interactive packet manipulation tool, packet generator, network scanner, network discovery, packet sniffer, etc. It can for the moment replace hping, 85% of nmap, arpspoof, arp-sk, arping, tcpdump, tethereal, p0f, ....