OpenTaxSolver (OTS) is a free program for calculating Tax Form entries and tax-owed or refund-due, such as Federal or State personal income taxes.
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux


Good Calculators is described as 'A collection of really good online calculators for use in every day domestic and commercial use' and is an website in the education & reference category. There are four alternatives to Good Calculators, not only websites but also apps for a variety of platforms, including Android, iPhone, iPad and UNIX Web Browser apps. The best Good Calculators alternative is Open Tax Solver, which is both free and Open Source. Other great sites and apps similar to Good Calculators are Visual Sm.Art, Taxfix and Portion Master: Recipe Scaler.
OpenTaxSolver (OTS) is a free program for calculating Tax Form entries and tax-owed or refund-due, such as Federal or State personal income taxes.


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