Adder is a tool used for experimentation with runtime modification of binary applications. It’s also useful for prototyping run-time patches, understanding the effects and possibilities of call-hooking, and other run-time program tweaks. Definitely worth a download and something to play with.
You can download it from the following link: https://packetstormsecurity.com/files/download/32990/adder-0.3.3-src.zip
Source: https://packetstormsecurity.com/files/32990/adder-0.3.3-src.zip.html