steamdb.info
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defuse.ca
Online checksum tool for calculating hashes from text or files for verification and security checks.
raj457036.github.io
Calculator for converting and evaluating infix, postfix, and prefix expressions.
howlongtoread.com
Reading-time calculator for estimating how long a book or text will take to read.
stepbystepml.com
Free online machine learning calculators. Input your dataset and watch algorithms like K-Means, Minimax, and KNN get solved step-by-step for CS exams.