Standard 5x5 bingo: the B column is 1-15, I is 16-30, N is 31-45 with a free centre, G is 46-60 and O is 61-75. Each column is shuffled on its own, so every card is a valid board.
Check a phrase or number as a palindrome with a character mirror map and the longest palindromic substring.
A single-column print-ready resume that renders as you type, with skill proficiency bars, bullet achievements and a copy-as-text version.
Six cover-letter templates driven by a pasted job description, with a real ATS keyword-match readout that stems and de-duplicates, plus an ASCII-safe plain-text export.
Spaced-repetition decks that live in your browser.
Multiply, invert, transpose and find eigenvalues with full double precision.
Spell any number out in words, and hear it spoken aloud.
Vis-viva, escape velocity, Hohmann transfers and the gravitational constant, done properly.
Range, apex, flight time and impact angle for any launch speed and angle.
