The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
A drop-in replacement for PHP's default session handler which stores session data in a MySQL database, providing both better performance and better security and protection against session fixation and session hijacking
Hacker101 is a free class for web security. Whether you're a programmer with an interest in bug bounties or a seasoned security professional, Hacker101 has something to teach you.