Bandwidth Utilization Billing and Basic Accounting
BUBBA is a group of utilities for the archiving and viewing of RRD data. It is typically used to provide long-term detail data for other RRD frontends such as Cricket and NagioStat.
(commercial) A Unix based software application designed to bill for recurring and usage based products. Supported industries include Dial-up ISPs, Wireless ISPs, Broadband ISPs, Webhosts, VoIP, HotSpots, ...
(commercial) ClearHealth is a practice management system and EMR. It takes DNA from the FreeMED and OpenEMR projects, is based on the smarty templating engine, and uses the FreeB2 medical billing engine. Read more
A financial application for small companies. It can manage products, customers, and suppliers, and generate and print invoices.
An ISP billing and management system. It features automatic generation and emailing of invoices and statements, a customer interface, a ticket system, DNS management, and much more.
A GPL cash register written in C using GTK+. easyPOS uses "standard" POS hardware. the slip printer is attached to the parallel port and is fed by standard lpr commands. the cash drawer connects to a port on the slip printer which is pulsed to open the solenoid door lock when you send an ascii bel to the printer.
An Italian open source project, published on SourceForge, released with GPL license. It manages all the activity of a Legal Study and the italian lawyers invoices.
A Medical Billing System that is capable of printing HCFA 1500 forms and generating HIPAA compliant X12 837p edi files.
GesCom is a POS system with a character-based interface. It allows billing, stock management, and and price listing. It works for many branches, and works with "controladoras fiscales" from Argentina.
invoicebot is a custom time tracking, quotation, and invoicing system. invoicebot was written by thoughtbot and is used in house for all our invoicing. Invoicebot is written in Perl and MySQL.
INVOICER is an accounting software solution intended for small business owners. It is a powerful tool for drawing and keeping track of all the VAT invoices in small organizations with no warehousing facilities.
Apart from invoicing capabilities, the program can:
print sales records and sets of documents,
create a customer database,
and create a directory of products and services.
A user management and billing system designed for internet and access service, and hosting providers.
JIM Invoice Manager
JIM Invoice Manager is invoicing software for SMBs.
L'ane (L'anePOS) is a point-of-sale (cash register) and backoffice program for retail businesses and restaurants written in Perl on Linux/Unix.
MirrorMed is a friendly fork of ClearHealth. It uses the same codebase with slower releases, further testing, and additional forms, reports, and other small improvements. As with ClearHealth, MirrorMed also borrows from FreeMed and OpenEMR.
(commercial) 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.
Paymaster is an open source free payroll and HR application designed for small to large organisations. It works in batch process system for paying employees, using journal entries and a series of ledgers for storing the accounts. A customisable backed calculates the results to help meet the diverse requirements of payroll. Complex tax laws, leave, varying pay rates, allowances, superannuation are some of the things the payroll system can handle.
Simple Invoices is a clean, simple, and basic Web-based invoicing system. It is meant for personal invoices, home office invoicing, small organization invoicing, and basic POS (point of sale) systems for light usage.