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OpenMoneyBox is an application designed to manage small personal budgets in the easiest way.
Check the homepage to download apps/packages for additional Operating Systems.
A quantitative finance C++ library for modeling, pricing, trading, and risk management in real-life. A cross-platform free/open-source tool for derivatives and financial engineering.
The Zahlemann site used to be the home of the Zahlemann project (which currently sleeps). Now I use it for different little tools I write. See project home page (http://zahlemann.sourceforge.net) for more information.