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.
Related Software
| Terminal-Based Calculators | |
|---|---|
| Genius | Desktop calculator, an educational tool in mathematics, and for research |
| Numbat | High precision scientific calculator supporting physical units |
| kalker | Calculator with math syntax |
| qalc | Symbolic maths, arbitrary precision and unit conversion |
| calc | C-style arbitrary precision calculator |
| concalc | Parser-algorithm of extcalc |
| wcalc | Uses intuitive expressions and implicit multiplication |
| pcalc | Terminal calculator made for programmers |
| bcal | Storage expression calculator |
| numr | Text calculator for natural language expressions |
| kalc | Complex numbers, 2d/3d graphing, arbitrary precision calculator |
| clac | Stack-based calculator with postfix notation |
| CalcPy | Calculator and advanced math solver using Python, IPython and SymPy |
| fortbite | Powerful mathematical calculator leveraging Fortran’s strengt |
| abacus | Simple interactive calculator CLI |
| Daisy | General-purpose TUI scientific calculator |
| Quich | Just an advanced terminal calculator |
| orpie | curses-based RPN calculator |
| val | Arbitrary-precision language with variables, functions and complex numbers |
| Squiid | Advanced calculator supporting both RPN and algebraic input |
| mucalc | Convenient calculator for the command line |
| HIP35 | HP-35 RPN calculator emulator |
| csc | Scientific maths using 64-bit floating-point arithmetic |
| RCalc | Reverse Polish Notation calculator |
| ec | RPN calculator with array operations and quotations |
| coriolinus-calc | CLI calculator app and library |
| spigot | Streaming exact real calculator |
| Rink | Provides unit conversions, arbitrary precision and dimensional analysis |
Read our verdict in the software roundup.
 Explore our carefully curated directory of recommended free and open source software, covering every major software category.The directory forms part of our extensive collection of articles for Linux enthusiasts. It includes hundreds of detailed reviews, together with free and open source alternatives to proprietary software from companies such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. LinuxLinks also covers interesting projects worth exploring, Linux-compatible hardware, free programming books and tutorials, and much more. Know a useful free and open source Linux application that we haven’t covered? Tell us about it using our submission form. |
Please read our Comment Policy before commenting.