This is a calculator, but it does some niche things most standard calculators don't do.
I was inspired to make this after Google kept giving me the factored quadratics instead of the answers. v0.0.0 - Quadratic Calculator v0.1.0 - Arithmetic Calculator v0.2.0 - Exponential Unit Digit Calculator v0.3.1 - Quadratic Calculator now gives imaginary solutions v0.3.2 - Bug fixes with Thinker Cat not saying anything v0.4.2 - Factorial Calculator v0.5.2 - Logarithmic Calculator v0.5.3 - Logarithmic Calculator now gives feedback if arguments or bases are negative, zero, or sometimes 1. v0.5.4 - Logarithmic Calculator now gives integer solutions if the exponent is a natural number, instead of a decimal which is too small to matter. v0.5.5 - Exponential Unit Digit Calculator can now find the unit digit of numbers greater than 9. v0.6.5 - Added Distance Formula calculator v0.7.5 - Added Midpoint Formula calculator v0.8.5 - Added slope calculator v0.9.5 - Added Pythagorean Theorem calculator v0.9.6 - Put Pythagorean Theorem and Distance Formula into the group "Missing Sides"