https://cntrpl.itch.io/voidsprite
This sprite editor not only offers compatibility for an ever-expanding amount of formats (currently including such obscure formats as XYZ, SPK and BDY) but also annotated templates for most important rpgmaker 2003 needs! A customizable on-screen grid, animation preview, and tileset preview are also present, alongside with LMU map layout preview which changes with every change in your own canvas! And of course, due to the free and open-source nature of the project, you may assist us in making it better via Github! Please, check out our hard work and share it around!