Finance Open source
- BulmaGes — Qt-based
- GnuCash — Double-entry book-keeping
- Grisbi — Single-entry
- JCash — Java-based
- jFin
- JGnash — Java-based, double-entry book-keeping
- JMoney — Java-based
- KMyMoney — Double-entry book-keeping
- LX-Office — Double-entry book-keeping/ German adaptation(SQL-Ledger fork)
- Marketcetera — Algorithmic trading platform for equities, options and more
- Mifos — Microfinance Institution management software
- Money Manager Ex personal finance organizer
- Opentick — Market-data (U.S. Markets) source feed for software development
- osFinancials — Double-entry book-keeping for Windows
- PayThyme — Payroll software
- phpOrganisation
- QuantLib — Quantitative finance libraries
- Quasar Accounting
- QuickFIX — FIX protocol engine written in C++ with interfaces for several languages
- QuickFIX/J — FIX protocol engine written in Java
- QuotesViewer — Euronext stock quotes, watchlist
- SQL Ledger — Double-entry book-keeping
- TimeTrex — Payroll and Time Management
- TurboCASH — Double-entry book-keeping for Windows
- LAMP Accounts — LAMP based day to day business management software
- See also: Comparison of accounting software