Accounting & Best Practice Business Administration System
Open Source Microfinance Suite
FreelancerBooks -Project Management for Freelancers and Agencies
Invoice and office utilities program for customer managment
A complete invoice managment solution for Elastix PBX
Programa - web-php para gestionar facturas en base de datos mysql.
Free web-based invoicing primarily for Finnish companies
moved to github: https://github.com/malkusch/bav