C, C++ with STL, Python, Java, SQL, HTML & CSS, Assembly Language, Vulnerability Analysis, Penetration Testing on CTFs, Web Application Security, Wireless Security, Network Security, Mobile Application Security, Metasploit, SET toolkit, Maltego, NMap, Wireshark, Nessus, Routersploit, Burp suite, Reverse Engineering, John The Ripper, Hashcat, Bettercap, Linux terminal, Raspberry Pi, Arduino, Atmel AVR chip, Digispark