DawnBringer has released an awesome set of Factory lua scripts for GrafX2.
* MANY Palette analysis & optimation tools
* 3D-palette viewer
* AA-color finders
* Brightness/Hue/Contrast/Balance/Saturation/Lightness adjustment for Palette, Brush or Color (top quality)
* Tint/Colorize (Image & Brush)
* RetroFormat remapping
* C64-format testing
* Brush-2-Image, Image-2-Brush, Crop Brush Margins
* Curved Color Ramps (wip)
* Image effects & filters
* Palette/Histogram/Mixcolortable to Brush
* RubThru Pencolor (Spare 2 Main)
* TileSheet reorganizer
and much, much more...