There are 3 links tagged.
http://www.opendb.net/paypal_ipn.php
Added: 23/08/09 Tags: paypal IPN
https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/library_code
Added: 23/08/09 Tags: paypal IPN samplecode
http://www.web-development-blog.com/archives/easy-payments-using-paypal-ipn/
Added: 18/03/08 Tags: php paypal IPN