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kalkerModular Calculator
Free

Free and open source under the MIT licence.

 Free

Free and open source under GPL-3.0-or-later.

Windows, macOS, Linux, Android, Web, Command line Linux
  • Natural math syntax with user-defined functions and variables
  • Handles complex numbers, vectors and matrices
  • Handles variables, functions, units and arrays
  • Supports calculations with numbers in different bases
  • Derivatives and integrals are numerical estimates
  • Higher-order derivatives can be inaccurate
  • Linux is the only listed platform
Downloadable app, Web application Downloadable app
Open source Open source
License: MIT License: GPL-3.0-or-later
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 2, 2026

Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.