ISPacct (formerly Brickacct) accounts the logfiles which Bintec routers spew out depending upon configurable rules. Logfile-analyzing mail accounting functionality is also included (in beta stage). It has multiple backends like text, HTML, and MySQL. It was designed and used by a small ISP and is geared towards such uses as monthly accounting per IP or per dial-in use.
Monetra is a scalable payment processing engine for Linux, Unix, and Windows. It is designed to handle credit, debit, gift, EBT, and check authorizations and is certified to support major clearing house protocols. Features include support for multiple modems, multiple merchant accounts, and multiple processors, all simultaneously -- as well as IP and SSL connectivity along side SQL database support. Designed in C, conforming to POSIX standards, and utilizing light weight processes (threads), this product is able to handle a large number of transactions with high speed and minimal CPU usage.