Excalibur
Excalibur for Windows 32-bit version is a freeware full featured RPN-only calculator.
19 Alternatives To Excalibur
Airtable
Airtable works like a spreadsheet but gives you the power of a database to organise anything.
Airtable can store information in a spreadsheet that’s visually appealing and easy-to-use, but it’s also powerful enough to act as a database that businesses can use for customer-relationship management (CRM), task management, project planning, and tracking inventory.
Calculator by Xlythe
Calculator is a simple 4 function calculator.
Gnome calculator
Calculator for the GNOME Desktop Environment, formerly known as gcalc (and gcalctool CLI).
Google Sheets + MonkeyLearn
Power up your Google Sheets with text analysis
MyScript Calculator
Perform mathematical operations naturally using your handwriting.
PCalc
PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody…
Reactivepad
Documents made smart with textually narrated calculations í ½í³í ½í³
SimpleCalc
A calculator written in C#.NET 3.5 that aims to be simple and usable.
TTCalc
TTCalc is an open source bignum mathematical calculator.
TotalSheets
A powerful spreadsheet app in your browser í ½í³
handyCalc
Solve things in your hand.