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 * [Desmos](https://www.desmos.com/) - Graphing Calculator
 * [TicCalc](https://www.ticalc.org/pub/) - TI Graphing Calculator Files
 * [TI-Basic Developer](http://tibasicdev.wikidot.com/) - TI-Basic Info Repository
-* [fxSolver](https://www.fxsolver.com/), [Kalker](https://kalker.xyz/) / [GitHub](https://github.com/PaddiM8/kalker) or [The Engineering ToolBox](https://www.engineeringtoolbox.com/) - Engineering & Scientific Calculator
+* [fxSolver](https://www.fxsolver.com/), [Calculator++](https://f-droid.org/packages/org.solovyev.android.calculator/), [Kalker](https://kalker.xyz/) / [GitHub](https://github.com/PaddiM8/kalker) or [The Engineering ToolBox](https://www.engineeringtoolbox.com/) - Engineering & Scientific Calculators
 * [SciDAVis ](https://sourceforge.net/projects/scidavis/) - Scientific Data Plotter
 * [FreeFEM](https://freefem.org/) - Partial Differential Equations Solver
 * [Approach0](https://approach0.xyz/search/) - Math Formula Search