Olvio.Ecommerce is a payment processing class library for the Authorize.Net gateway. It includes all the latest features, SIM and AIM integration methods, CC and ECHECK processing, hash validation, response stream reader and more.
IBillIt for AIM and ARB is a single library for integrating with Authorize.net's AIM and ARB APIs w/bonus features like line order item tracking, totaling, and custom data support. Authorize.net certified.
CIM Library integrates Authorize.Net's CIM Service. CIM enables PCI-DSS compliance. CIM Library uses a familiar object model and provides events and multi-threading options. Built on .NET. IT DevWorks is an Authorize.Net Certified Developer.