Magento ACH Payments Module 

ACH Payments provides a suite of payment processing services -- all available in one platform – including Electronic Checks, Credit Card Merchant Accounts and Gateways Services, Advanced Check Verification, Website Payments, Identity Verification, NSF Check Collection, and Payment Processing Plug-Ins. With the growing popularity of Magento Shopping Cart, ACH Payments needed a way to offer their payment processing service to ecommerce retailers using Magento Shopping Cart. Thylaksoft created a plug-in that allows Magento users to use ACH Payments’ payment processing services.

Magento retailers can download the plug-in from the Magento Commerce site at:
http://www.magentocommerce.com/extension/2581/thylaksoft_ach_payment