Add Sprite Fusion, a free, web-based 2D tilemap editor (#310)

* feat: add Pixelicious, free image-to-Pixel Art

* feat: add Sprite Fusion, a free tilemap editor

* feat: Keep the list alphabetically sorted

README.md

@@ -117,6 +117,7 @@ _Great graphics placeholders and tools to turn that squared game into a picasso
 - :tada: [Material Maker](https://github.com/RodZill4/material-maker) - procedural texture creator made in Godot
 - :tada: [OGMO Editor](https://ogmo-editor-3.github.io/)- generic level editor.
 - :tada: [Overlap2D](https://github.com/UnderwaterApps/overlap2d/) - a 2D level and UI editor with an engine agnostic philosophy.
+- :free: [Sprite Fusion](https://spritefusion.com/) - A free level design tool to craft beautiful 2D tilemaps right in your browser using any tileset.
 - :tada: [Tiled](http://www.mapeditor.org/) - free, easy to use and flexible tile map editor.
 
 #### Animation