Browse free open source Security software and projects for Windows below. Use the toggles on the left to filter open source Security software by OS, license, language, programming language, project status, and freshness.
A lightweight and easy-to-use password manager
An easy-to-use anti-spam email gateway
Anti-Spam SMTP Proxy Server implements multiple spam filters
WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
Browser for using Tor on Windows, Mac OS X or Linux
A little tool to play with Windows security
The faster, safer desktop browser for macOS, Windows, and Linux
An open-source x64/x32 debugger for windows.
View and manage processes, services and more with this powerful tool.
Set of Ansible scripts that simplifies the setup of a personal VPN
A hard drive disk wipe and data clearing utility
A Windows password cracker based on rainbow tables
A security tool to remove sensitive data from your Windows hard drive
Antivirus software with virus scanning and virus definition updates
Metasploitable is an intentionally vulnerable Linux virtual machine
WPS wireless protocol audit software for Windows
A network stress testing application
A cross-platform network scanner that is fast and simple to use
A secure socks5 proxy for Windows
A simple keylogger for Windows, Linux and Mac
Popular easy-to-use and secure password manager
A free utility that finds malware and other threats
Mass IP port scanner