I know I already made a thread about this a few months ago, but I added more features so meh. And it got buried pretty fast. Hopefully it still counts as a C3 project.
Besides that, we all know C3 threads are cooler.
I present to you the latest version of GradientTool!
GradientTool is an HDMA gradient generator; it allows you to generate gradients using linear, sinewave, cubic, Catmull-Rom, or Hermite interpolation.
It also supports scrolling gradients and palette gradients.
In the latest version, there's a grid that appears when you zoom in 4x or more; you also have the choice of which units you use in the colour selector. Catmull-Rom and Hermite interpolation were also introduced.
Bundled with this application are some example ASM files for using scrolling HDMA gradients; one is a table, and the other is the code.
Requires Microsoft .NET Framework 4.0