Drawing tool for pedigree charts

• A tool for drawing a pedigree chart (family tree chart) in SVG format, and its breaf description and detailed manual are available.

Code for fuzzy search

• Some demo pages related to a BK-tree are listed. The JavaScript functions used there are available on my GitHub repository. With these functions, you can easily implement fuzzy search.

Other toy systems

• Test RGB colors and HSL colors.
• See the list of my GitHub repositories.

Fun

• Can I draw a fractal such as the Sierpinski carpet by using nested <g> and <use> elements in SVG?
• Enjoy Euler's magic square, which is one of the most fabulous magic squares.
• The wax and wane of the Moon using emoji characters.
• I colorized Prof. Mitani's tree drawing animation.

Reference material

• A keyboard diagram (in PDF): A keyboard (of MacBook Pro) is illustrated so that each key top is associated with characters of five languages (more specifically, a Latin character in both lowercase and uppercase, one or two Japanese hiragana characters, a Cyrillic character in both lowercase and uppercase, one or two components of Hangul, and an Arabic character).
• A quick reference to one-byte values.