Dev tools · alternatives · 2026
24 alternatives to CalcForge
Open Source Calculators for STEM
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. CalcForge launched in 2024; newer entries below may have overtaken it.
- 1
- 2AD
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 →
- 3CA
2021 · mkhan45.github.io · its alternatives →
- 4NNoteCalc▲267
2020 · github.com · its alternatives →
- 5KA
2016 · knightos.org · its alternatives →
- 6PA
2023 · github.com · its alternatives →
- 7OS
Hey HN! I'm Zach from Adam (https://adam.new/). We’re building an AI co-pilot for mechanical CAD software. As part of our broader research, we built a browser-based Text-to-CAD app (https://news.ycombinator.com/item?id=44182206) and are now open sourcing it. This is a React SPA with a Supabase backend. What it does: * Generates parametric 3D models from natural language descriptions, with support for both text prompts and image references * Outputs OpenSCAD code with automatically extracted parameters that surface as interactive sliders for instant dimension…
2025 · github.com · its alternatives →
- 8
- 9
Free access to TI84 and TI83 Plus calculators
2024 · sagecalc.com · its alternatives →
- 10
- 11
- 12SL
Hey everyone, I’m Weike, one of the founders of Stride, a more modern technical documentation + calculation software for engineers and other calculation-driven professionals. I worked as a structural engineer before and have always found the tools to create calculations (Excel and Mathcad mainly) to be unintuitive, terrible at communicating the intent of the calcs, and hard to integrate with my other tools. Honestly lots of it was just doing stuff on Excel, then screenshottinng it, and then putting it in a PDF document. Years later, I worked as a software engineer and saw all the fantastic…
2024 · get-stride.com · its alternatives →
- 13CW
2015 · cadwolf.com · its alternatives →
- 14OS
I got tired of collecting open source projects in my chrome bookmarks so I decided to compile a curated list of: - Recently active projects on GitHub - Mostly dev tools (but also productivity, analytics) - Projects which are "Alternative to X software" My bookmarks are finally empty:D If you have a great open source tool you use, I'd be glad to hear your suggestions. Also, any feedback is greatly appreciated.
2025 · alternativeoss.com · its alternatives →
- 15
- 16
- 17
Free Coding editor for schools: P5, Python, Java, R, HTML...
Jun 2026 · trinket.strivemath.org · its alternatives →
- 18
Free electrical calculators & tools
2025 · electriciancalc.com · its alternatives →
- 19
- 20
- 21
A simple program for perform mathematical calculations.
2025 · calculationassistant.com · its alternatives →
- 22SC
During my (ongoing) engineering degree, I've often looked up formulas and been frustrated at the lack of reliable results. Some formulas (usually the easy ones) get their own blurb on Google results, while others are a few clicks away, or are most easily accessed by looking at random university slides on Google images. It felt like, in this day and age, there should be a site that serves the small but noble purpose of being a source of truth for formulas, while leveraging modern website technology to provide a fast and user-friendly experience. So, I made stemformulas.com (with some…
2023 · stemformulas.com · its alternatives →
- 23
Free online scientific calculator for math & more
2025 · scientificcalculatoronline.io · its alternatives →
- 24
All-in-one smart digital calculation tools
Mar 2026 · its alternatives →
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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 →