orpie is a curses-based RPN calculator.
The interface is similar to that of modern Hewlett-Packard calculators, but has been optimized for efficiency on a PC keyboard. The design is also partly influenced by the Mutt email client and the Vim editor.
orpie doesn’t have graphing capability, nor does it offer much in the way of a programming interface.
This is free and open source software.
Website: github.com/pelzlpj/orpie
Support: Manual
Developer: Paul Pelzl
License: GNU General Public License v3.0
orpie is written in OCaml. Learn OCaml with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

