Dev tools · alternatives · 2026
24 alternatives to Fcal
Open source cross platform calculator for programmers
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Fcal launched in 2020; newer entries below may have overtaken it.
- 1
- 2CA
Hi everyone, here's a web app I made that generates code for efficiently approximating mathematical functions. This is useful when performance matters more than perfect accuracy, for example in embedded systems. The app uses Chebyshev expansions, which despite their theoretical depth result in suprisingly compact and readable code in practice. This code is generated for you and using it does not require any knowledge of the underlying theory. Source code and more info: https://github.com/stuffmatic/chebyshev-calculator
2024 · stuffmatic.com · its alternatives →
- 3
- 4AD
A new calculator software cannot really bring attention (https://chachatelier.fr/chalk/) However, I wrote a full article explaining why I had to build something "new" that does not behave like usual desktop calculator softwares : TL;DR All "small" calculator softwares I know share the same design flaws. And the GUI is not the only stumbling block in their poor efficiency. Handling correctly numerical approximations - expected or not - is crucial to trust the results. It is usually not done in lightweight tools. It should. So I prove that if I could do it, OS manufacturers…
2022 · its alternatives →
- 5BS
2020 · github.com · its alternatives →
- 6AM
2012 · github.com · its alternatives →
- 7
- 8
- 9
- 10
An npm library package to calculate everything you want.
2022 · its alternatives →
- 11TA
2023 · hissab.io · its alternatives →
- 12
Calculate percentages in a neumophic and efficient interface
2021 · its alternatives →
- 13AB
2020 · saasformulas.com · its alternatives →
- 14
Advanced calculator suite for desktop and mobile
Jun 2026 · nexus-calc-by-mh.lovable.app · its alternatives →
- 15MM
2016 · mathquill.com · its alternatives →
- 16FE
2020 · github.com · its alternatives →
- 17
GitHub▲5Minimal calculator built with core web technologies
Jan 2026 · github.com · its alternatives →
- 18CH
Every Calculation Tool You'll Ever Need. Growing list of calculators, in a clean, simple design.
2025 · calculation-hub.com · its alternatives →
- 19
Crunch numbers using functional programming!
2025 · rohanphanse.github.io · its alternatives →
- 20
Free MCP Server for advanced math and complex calculations
2025 · hissab.io · its alternatives →
- 21
Your trusted companion for quick calculation needs
2025 · lcalculator.com · its alternatives →
- 22
- 23
- 24AO
Hi HF, I'm Terrell, and we built an open-source app that lets developers create their own Operator with a Next.js/React front-end and a flask back-end. The purpose is to simplify spinning up virtual desktops (Xfce, VNC) and automate desktop-based interactions using computer use models like OpenAI’s There are already various cool tools out there that allow you to build your own operator-like experience but they usually only automate web browser actions, or aren’t open sourced/cost a lot to get started. Spongecake allows you to automate desktop-based interactions, and is fully open…
2025 · github.com · its alternatives →
Also compare
- Numi alternatives
- Chebyshev approximation calculator alternatives
- KnightOS alternatives
- All desktop software calculators are wrong, so I had to build my own alternatives
- bcal – Storage & general-purpose CLI calculator for programmers alternatives
- Advanced Mathematics Library for Node.js and JavaScript alternatives
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →