nacha-cheese
Nacha Cheese is a TypeScript library for generating NACHA (Automated Clearing House) files, which are used to initiate ACH transactions in the United States.
@ach/ach
NACHA ACH EFT File Parser/Editor/Formatter for CCD+ / PPD+ / CTX+
nach2-aimpoint
nACH is a highly customizable Node.js module exposing a high & low-level API for generating ACH files for use within the ACH network