Showing 221–240 of 1,000 ranked alternatives.
Peter Li
Memorize with color and music
Memorize of pi using color and musical notes for enhanced recall. View numbers in chunks with customizable pages and lines. Compete on leaderboards and earn achievements. Practice daily for improved retention.
Kitt Peak, Inc.
Simulate and operate aircraft engines
Simulate and operate various four-stroke aircraft engines including inline 4, radial, inverted V, W, and H types. Learn about engine mechanics through interactive models. View historical development of reciprocating aircraft engines.
Julian Tigler
Send secret messages with ciphers
Send encrypted messages using historical ciphers like A1Z26, Caesar Shift, and Vigenere. Encrypt text with customizable settings. Share coded messages via text or email. Decode messages using the same methods. View details and instructions.
NCH Software
Write with free-form
Create and edit sheet with customizable tools. Adjust dynamics, clef, key signature, and time signature. Add and transpose notes easily. Export scores as MIDI, PDF, or print directly.
Shahbaz Khan
And build web apps
With interactive tutorials and project-based lessons. Complete exercises to practice coding concepts. Access code examples and debug tools. Track progress and review lessons for reinforcement.
Pierluigi Solimena
Convert numbers between decimal, binary, hexadecimal,
Convert numbers between decimal, binary, hexadecimal, and octal systems. Input integers from 0 to 2^31-1. Perform conversions in both directions. Display results in selected number formats.
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