Door Lowerland: http://securitythoughts.wordpress.com/2010/03/22/vulnerable-web-applications-for-learning/
http://pentestlab.org/10-vulnerable-web-applications-you-can-play-with/
http://www.irongeek.com/i.php?page=security/deliberately-insecure-web-applications-for-learning-web-app-security
mvg
nog 1 http://www.dvwa.co.uk/ <- die is erg goed overigens. and free of charge.