Top 4 anti-debug open source projects

Advanced usermode anti-anti-debugger. Forked from https://bitbucket.org/NtQuery/scyllahide

Anti-Debug encyclopedia contains methods used by malware to verify if they are executed under debugging. It includes the description of various anti-debug tricks, their implementation, and recommendations of how to mitigate the each trick.

ShowStopper is a tool for helping malware researchers explore and test anti-debug techniques or verify debugger plugins or other solutions that clash with standard anti-debug methods.

Unprotect is a python tool for parsing PE malware and extract evasion techniques.