Math Questions Hub has solvers for 14 math topics, and each one calculates the answer in your browser with fixed rules, so the same problem always gives the same result. Every question gets a shareable link, and long-form guides explain the method behind each topic. Built for students who want a worked answer and a way to check their own.
Codice Fiscale Pro calculates an Italian codice fiscale from name, surname, date and place of birth, decodes an existing code to show the data inside it, and verifies whether a code is valid. No signup. The interface is in Italian.
Calcola Stipendio converts an Italian gross annual salary (RAL) into monthly and yearly net pay, and calculates gross from net. You can set 12, 13 or 14 months, add regional and municipal tax, and apply family deductions. It's built for people comparing job offers in Italy. No signup, and the site scores 95 on PageSpeed, so it loads fast on mobile. The interface is in Italian.
