Spak (Send PAcKet) is a collection of programs that can be used to create and send a packet over a network. Spak is designed to be very modular and allow as much control over the design of the packet as possible. The modules included with this release are makeip, maketcp, makeudp, makearp, makeeth, sendpacket, and sendeth. Spak was developed and tested under Linux 2.0.x, SunOS 5.5.1, and BSDI 3.1 systems.
You can download it from the following link: https://packetstormsecurity.com/files/download/13349/spak-0.6b.tar.gz
Source: https://packetstormsecurity.com/files/13349/spak-0.6b.tar.gz.html