Cruip - Landing page templates for startups
Carrd - Simple, responsive one-page site creator.
LP151 - You can create a landing page here
Color Hunt - Curated collection of beautiful colors, updated daily
WiX - Create a free website with Wix.com. Customize with Wix' website builder, no coding skills needed. Choose a design, begin customizing and be online today
Contrast - A macOS app for quick access to WCAG color contrast ratios