Simple Packet Sender (SPS) is a Linux packet crafting tool. It supports IPv4, IPv6 (but not extension headers yet), and tunneling IPv6 over IPv4. Written in C on Linux with GUI built using GTK+. Both source and binaries are included. Features include packet crafting and sending one, multiple, or flooding packets of type TCP, ICMP, or UDP. All values within ethernet frame can be modified arbitrarily. Supports TCP, ICMP and UDP data as well, with input from either keyboard as UTF-8/ASCII, keyboard as hexadecimal, or from file. Various other features exist as well.