Tools
Pentesting
Burp Suite
Standard Web Testing Tool
Cyber Chef
I will temporarily call it a versatile encryption and decryption tool
ExploitDB
Repository for storing information and techniques for exploiting security vulnerabilities
GTFOBins
A list of Unix binaries that can be exploited to bypass local security restrictions
Metasploit
Automated exploit development tool but requires some advanced techniques
Nmap
Tool for collecting information about targets
Operating Systems
CachyOS
My main operating system for daily tasks and learning security
Kali Linux
The most popular Linux distribution for penetration testing and security research
Windows 10
I use it to practice Windows-related techniques and for tasks that require a Windows environment
WMWare Workstation Pro
Virtualization platform, the pro version is now free.