add pixel art tools (#385)

README.md

@@ -160,6 +160,7 @@ _Great graphics placeholders and tools to turn that squared game into a picasso
 - :free: [Tilemancer](https://led.itch.io/tilemancer) - A quick procedural tile creator designed for pixel-art games.
 - :free: [Timanthes](http://csdb.dk/release/?id=75871) - A pixel art editor for the Commodore 64 computer running on Windows
 - :free: [Charas](http://charas-project.net/index.php) - Charas is a charset generator for RPG Maker.
+- :tada: [Sprite Fusion Pixel Art Cleaner](https://www.spritefusion.com/pixel-snapper) - Convert messy AI-generated pixel art into true, pixel-perfect pixel art. [Source](https://github.com/Hugo-Dz/spritefusion-pixel-snapper)
 - :free: [Spritemate](http://www.spritemate.com) - Online Editor for Commodore 64 Sprites
 - :tada: [Squoosh](https://squoosh.app) - Make images smaller using best-in-class codecs, right in the browser. 
 - :tada: [SVGcode](https://svgco.de/) - SVGcode is a Progressive Web App that lets you convert raster images like JPG, PNG, GIF, WebP, AVIF, etc. to vector graphics in SVG format.
@@ -368,6 +369,7 @@ _Set of game frameworks, engines and platforms_
 - :money_with_wings: [Coplay](https://coplay.dev?ref=github&utm_source=magictools) - AI Copilot for Unity
 - :tada: [Fluent Behaviour Tree](https://github.com/codecapers/Fluent-Behaviour-Tree) - C# behaviour tree library with a fluent API released under MIT.
 - :money_with_wings: [Rosebud AI](https://rosebud.ai) - Vibe coding platform for creating 3D games and interactive web apps with AI.
+- :money_with_wings: [Sprite Fusion AI Pixel Art Generator](https://www.spritefusion.com/pixel-art-generator) - AI-powered browser studio for generating, editing, animating, and exporting game-ready pixel art sprites, icons, props, and spritesheets.
 - :tada: [SimpleAI](https://github.com/mgerhardy/simpleai/) - C++11 behaviour tree based library with a QT5 based remote debugger (and with optional LUA bindings) released under MIT.
 
 ## Audio