| Awesome CTF |
A Curated List of CTF Frameworks, Libraries, Resources and Softwares |
| HackTheBox |
Pen-testing Labs |
| VulnHub |
Gain Practical 'hands-on' Experience in Digital Security, Computer Software & Network Administration |
| Hacking-LAB |
Online Ethical Hacking, Computer Network and Security Challenge Platform |
| OtherWire |
Learn and Practice Security Concepts in the Form of Fun-filled Games |
| CTF Me |
Learn CTF |
| CTF Time |
CTF Archive |
| CTF365 |
CTF Practicing |
| CTF Learn |
Hackers in Improving Your CTF Skills |
| CTF 101 |
Computer Security Competiton |
| Root Me |
Challange Your Hacking Skills |
| Backdoor |
Show Your Talent in a Competitive Environment |
| Hacker Center |
Learn Cybersecurity Skills by Playing Capture the Flag |
| Hacker Experience |
Game of Hacker Experience |
| Hack This |
Discover How Hacks, Dumps and Defacements are Performed |
| Crackmes |
Improve Your Reverse Engineering Skills |
| Challanges |
Reverse Engineering Challenges |
| ROP Emporium |
Learn Return-oriented Programming (ROP) through a Series of Challenges |
| Micro Corruption |
Embedded Security CTF |
| Hack This Site |
Free, Safe and Legal Training Ground for Hackers to Test and Expand Their Skills |
| Open Security Training |
OpenSecurityTraining.info is dedicated to sharing training material for computer security classes, on any topic, that are at least one day long. |
| Pwnable.kr |
'pwnable.kr' is a non-commercial wargame site which provides various pwn challenges regarding system exploitation. |
| Trailofbits Github |
CTF Field Guide |
| Shellter |
Social Network focused on information security |
| PicoCTF |
Computer Security Game Targeted at Middle and High School Students |
| Enigma Group |
Web Application Security Training |
| Can Hack Me |
Test Your Hack Skills |
| Komodo Sec |
Application Security Challange |
| Game of Hacks |
This Game was Designed to Test Your Application Hacking Skills |
| Hacker Test |
Your Own Online Hacker Simulation. |
| n00bs CTF Labs |
A Web Application that Hosts 15 mini Capture the Flag (CTF) Challenges Intended for Beginners |
| Crypto Club |
Crack Ciphers, Discover Secrets, and Improve Your Math Skills |
| The Cryptopals |
Sets of Crypto Challenges |
| Try to Decrypt |
Find Some Encrypted Texts in Different Levels of Difficulty |
| Electrica |
The Puzzle Challange |
| Pwn Adventure |
A Game is Intentionally Vulnerable to all Kinds of Silly Hacks |
| Smash the Stack |
Wargaming Network |
| Stypr |
Stereotyped Challenges |
| Under the Wire |
Wargames |
| PentesterLab |
Execises |
| Metasploitable |
Metasploitable is an Intentionally Vulnerable Linux Virtual Machine |
| FBCTF |
Facebook Capture the Flag |
| Nmap ScanMe |
Learn about Nmap |
| OWASP WebGoat Project |
Designed to Teach Web Application Security Lessons |
| Praetorian |
Exploit Your Way to the Secret Flag and Get Hired |