Add Ludo Toolbox to Spritesheet Tools (#486)

README.md

@@ -98,6 +98,7 @@ _Great graphics placeholders and tools to turn that squared game into a picasso
 - :free: [AnimGen Free Sprite Sheet Tools](https://animgen.com/tools) - Browser tools that convert GIFs to sprite sheets and back, slice grid sheets or auto-extract sprites from sheets with no grid, export PNG sequences, and remove solid or green-screen GIF backgrounds. Files stay on your device; sheets come with Aseprite-format JSON.
 - :tada: [Cheetah-Texture-Packer](https://github.com/scriptum/Cheetah-Texture-Packer) - High efficient and fast 2D bin packing tool
 - :tada: [Libgdx Texture Packer](https://github.com/libgdx/libgdx/wiki/Texture-packer) - Texture Packer built into Libgdx
+- :tada: [Ludo Toolbox](https://ludo.ai/developers/toolbox) - Free, open-source (MIT) command-line tools that run offline: slice and join spritesheets, find a sprite's feet pivot and box/capsule colliders, check loops, recolor to Lospec palettes, cut tilesets, and export to Godot, Unity, Phaser and TexturePacker. Plain JSON output for scripts and coding agents.
 - :free: [PicMason Sprite Sheet Splitter](https://picmason.com/en/sprite-sheet-splitter/) - Browser-based fixed-grid splitter with custom frame sizes, offsets and spacing. Exports PNG frames preserving source transparency and a ZIP with source coordinates; can skip fully transparent frames.
 - :free: [ShoeBox](http://renderhjs.net/shoebox/) - Adobe Air based app with game and ui related tools.
 - :tada: [SnowB Bitmap Font](https://snowb.org/) - Bitmap font generator