SymPy Gamma
WolframAlpha
Cymath
Photomath
Symbolab
Mathway
Brainly
Microsoft Math Solver
Bootstrap Money
Omni Calculator
Financial Independence Calculator
Company of One
Financial Toolbelt
Equity Calculator
Bootstrappers
Indie Hackers
SymPy GammaWolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
Omni Calculator - Helping you make rational decisions, one calculation at a time.
Cymath - Free Step-By-Step Solutions to algebra problems.
Financial Independence Calculator - How early can you 🍹retire if you move to another place?
Photomath - Photomath is a mobile app that will give you the ability to test your equations through a simple calculator interface that will fully explain the solution in a step-by-step fashion. Read more about Photomath.
Company of One - A book on why staying small is the next big thing in biz