A web based calculator with a clean interface that allows commenting, creating variables and more. The website also provides more tools like converter, VAT calculator, and more.

Blabr is described as 'Interactive tables, sliders, plots and more. Scientific computing in the browser' and is an website. There are more than 10 alternatives to Blabr, not only websites but also apps for a variety of platforms, including Self-Hosted, Mac, Windows and Linux apps. The best Blabr alternative is µCalc, which is both free and Open Source. Other great sites and apps similar to Blabr are Calculist, Observable Notebooks, Kajero and Swift Calcs.
A web based calculator with a clean interface that allows commenting, creating variables and more. The website also provides more tools like converter, VAT calculator, and more.

Data-Forge Notebook is a desktop data analysis and visualization tool for JavaScript. Great for learning JavaScript, visual prototyping and exploratory data analysis.



Qlate is a combination of a calculator and a notepad for dynamic calculations. It's more powerful than a simple calculator and more intuitive than an Excel sheet. All that power and intelligence is wrapped behind a beautiful, clean and minimal user interface.
Qlate is the most popular Android & Android Tablet alternative to Blabr.
Napkin is a unique mix between a notepad and a calculator. Doing quick calculations on your phone has never been easier!



Wakari, now part of Anaconda, provides web-based Python data analysis via embedded iPython notebooks.

JavaScript notebook tool for experimenting in JavaScript. Runs in the browser without a backend.
