Special thanks
- ryry013, for running the original EJLX weekly handwriting challenge back in 2017, the direct inspiration for Tegaki Tuesday

- bellumela , for drawing the 字ちゃん (Ji-chan) mascot art

- drago33, I miss you. Thank you for encouraging me over the years and being an awesome friend.

- mochamoko, for the many challenge suggestions over the years

- steamedbread, for help managing the challenge in the early days

- ...and everyone else who has submitted and contributed over the years!
Fonts
- Kei Ji (formerly K Gothic) by Kei — default Japanese handwriting font. Free for personal and commercial web-font use under the terms shipped with the font (see
LICENSE.txt). - KanjiStrokeOrders by Ulrich Apel, the AAAA project and the Wadoku project — kanji glyphs with stroke-number annotations in the Kanji of the Day imagein share previews and announcements. 3-clause BSD-style license .
Japanese-language resources
Stroke-order diagrams
Kanji of the Day page animations, and the GIFs returned by /so, /i, and various other kanji commands, are built with our fork of Kanimaji from KanjiVG data by Ulrich Apel, released under CC BY-SA 3.0 .
Frontend
- CodeMirror 6 by Marijn Haverbeke and contributors — powers the in-browser challenge editor along with its wonderful ecosystem of plugins.