Useful Online Tools

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Ketcher (Demo) by EPAM

A web-based chemical structure editor for drawing and editing molecular structures.

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EngineeringPaper.xyz

A free and open-source tool for engineering calculations (unit checking, solver, plot, etc).

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Japanese Letter Chart

A simple chart of Japanese letters with pronounciation examples.

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LiveCodes.io

A free, open-source, client-side code playground for web development.

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VERT.sh

A fast, ad-free, open-source file converter with no file size limit.

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Crossword Labs

A free crossword puzzle maker. You can build, print, share and solve crossword puzzles online.

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Scratch Projects for Kids

Simple Scratch projects that I want to share, especially to my children.

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