The free and Open Source productivity suite
Chromis POS, the new evolving face for your point of sale needs
Personal finance transaction tracker similar to the obsolete MS Money
uniCenta oPOS - dynamically evolving POS project
Membership management software
jGnash Personal Finance
osfinancials accounting and business processing software
Expense reporting system for business
Lean algorithmic trading engine by QuantConnect
Simple budget manager for your needs.
Utilities and extras for original Money Manager Ex
an embeddable spreadsheet for your web application