Format String Builder includes code and instructions for use of a program which aids in the creation of format string exploits. Includes fmtbuilder.c, a small program to help build the strings.
You can download it from the following link: https://packetstormsecurity.com/files/download/25122/fmtbuild.htm
Source: https://packetstormsecurity.com/files/25122/fmtbuild.htm.html