GetBricksApp - Bricks is a note-taking web app with a built-in calculator. It can be installed as a desktop or mobile app, because of PWA technology this app built with. Which is also makes it offline available. Notes created with Bricks can be shared.
Omni Calculator - Helping you make rational decisions, one calculation at a time.
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
Financial Independence Calculator - How early can you 🍹retire if you move to another place?
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
Company of One - A book on why staying small is the next big thing in biz