MiniCalc { minicalc.cpp }
This is a very small trojan horse I made a late night many many years ago. It was while I was still in school and took a C++ class. The program acts like a small console based calculator, but when run (as root) it puts a passwordless account on the system.

BlueShadow { blueshadow.cpp | setfile | readme.txt }
A really simple (and a bit stupid) program to steal the shadow file from Linux systems when being run as root. It's more or less just a copy program.