What are some alternatives?
When comparing FontStruct and Color Palette Generator, you can also consider the following products
FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
LOL Colors - Curated color palette inspiration.
BirdFont - Birdfont is a free font editor which lets you create vector graphics and export TTF, OTF, EOT and...
Material Palette - Generate and export your Material Design color palette
FontLab VI - font creation and editing, including variable fonts and color fonts
Klart.io Colors - A data-driven collection of beautiful color palettes 🌈