Apache::Centipaid is an Apache add-on module that allows content providers to collect small transaction fees (as low as $0.001) as payment for accessing parts of their Web site without changing their Web site design. The micro payment solution relies on Internet stamps for payment, providing a secure and anonymous method of payment. The module takes care of authorizing, accepting, and authenticating payments, as well as granting and disallowing access to users based on the payment information. It requires Apache with mod_perl support enabled.
The Centipaid PHP module allows administrators of PHP-based site such as PHPNuke sites to charge their users nominal fees to access certain sections of their site. It allows for groupings of modules in zones with their own rates and duration, and supports unlimited zones and modules.
Mail::Audit::Centipaid is an email filter that is used to detect the precence of electronic postage. Once detected, the postage is checked against the receipt server of Centipaid.com to insure that the the proper payment has been made. Centipaid.com can process electronic postage as low as $0.001. The idea of this filter came about as another method to control the growing problem of spam, which was proposed by the Adaptive Mail Delivery Protocol (AMDP).
SurgeMail is a next-generation Mail Server. It combines features, performance, and ease of use into a single integrated product. It supports all the standard protocols, such as IMAP, POP3, SMTP, SSL, and ESMTP. It supports several anti-SPAM features which include friend-lists, black-lists, email postage using centipaid, smite, and more.