Made with Inkscape a free vector graphics software. Also boards and piece stand. The SVG folder contains the sets but in SVG format so you can make your own custom sets and share them please. The PNG folder contains all mentioned above in picture format.
This repository contains CouchTomato's old wood pieces that are unfilled and the lance is also different. https://github.com/CouchTomato87/InternationalizedPieces
Pieces designed by peanatsu https://github.com/peanatsu/shogi_printout/releases
Various types of pieces https://github.com/yagu0/vchess