Mathematics, linear algebra and optimisation
Open Source Microfinance Suite
Create and print simple invoices
Sample/Actual payroll program/book in PHP and MySQL
FreelancerBooks -Project Management for Freelancers and Agencies
PHPawn is a web-based and visual basic pawnshop program.
FIDO strong authentication, encryption, digital signature engine
Expense reporting system for business
Interactive Brokers TWS / IB Gateway Host Tool
Generate professional invoices and business letters directly online
Ledger records using PHP and MySQL as a backend.
inventory system with barcode support
Free PHP Codeigniter Expense Manager (management) Script
Simple PayUMoney Payment Gateway Integration In PHP | Tutorial
A fully functional ERP suitable for institution of any size
a financial math library and financial market data database
A free alternative to MS Money