Over the years, Peter "corelanc0d3r" Van Eeckhoutte has contributed to many open-source projects, including Metasploit, Artillery, Nmap.Additionally, he has developed and published numerous free tools as well, including:
Mona.py is a python script that can be used to automate and speed up specific searches while developing exploits (typically for the Windows platform). It runs on Immunity Debugger and WinDBG, and requires python 2.7. Although it runs in WinDBG x64, the majority of its features were written specifically for 32bit processes.
Access repository here: https://github.com/corelan/mona
A python-based GUI wrapper for encfs and gocryptfs volumes. Runs on MacOS and Linux Access repository here: https://github.com/corelan/pyencfsgui
A simple certificate expiration monitor script. Get it here: https://github.com/corelan/certmon
DNS Hijack Monitor Repository: https://github.com/corelan/dnshjmon
You'll probably find download links on www.corelan.be to older scripts that may or may not be relevant anymore, including