PHP-Tutorials
http://www.w3schools.com/php/ (English)
http://www.php.net/manual/en/ (English)

http//www.schattenbaum.net/php/ (German)
http://tut.php-q.net/ (German)
http://www.php.net/manual/de/ (German)

IRC Clients
http://www.nnscript.com/ (Windows)
http://www.mirc.com/ (Windows)
http://irssi.org/ (Linux)
http://www.xchat.org/ (Windows and Linux)