epsilon

You may want to check out: The whole calculator running in a browser, thanks to emscripten : https://www.numworks.com/simulator/ An interactive PCB viewer, in the browser again : https://www.numworks.com/resources/engineering/hardware/elec... Full schematics https://www.numworks.com/resources/engineering/hardware/elec... And of course the whole source code to the operating system, https://github.com/numworks/epsilon

>I'm not sure how free this license is. There is an ongoing discussion about what license to use for what part of the project, and what is the rational behind such and such choice. See this Github issue: https://github.com/numworks/epsilon/issues/38

I very much like the idea of this calculator, particularly since it has a python implementation. However, there are a couple of caveats - it uses binary arithmetic, though since release it seems they've improved the accuracy, and also I'm not sure how free this license is[1]. For something that isn't open-source, but uses RPN and has quad-precision binary-encoded decimal precision the DM42 looks really nice[2]. [1] https://github.com/numworks/epsilon/blob/master/LICENSE [2] https://www.swissmicros.com/dm42.php

This calculator doesn't seem to support RPN though: https://github.com/numworks/epsilon/issues/35 Too bad. There's always https://www.swissmicros.com/