Mesh (meshgradient.com) is a free, minimalist WebGL tool for creating mesh gradients: click to add a color point, drag to warp the blend, shift-click to remove a point.
Because color blends outward from multiple points rather than along a single line, the resulting gradients look softer and more dimensional than a standard linear gradient, without needing any design software installed.
Designers wanting a quick, no-install way to build a soft, organic mesh gradient for a background, without learning a full gradient editor's interface.
It's intentionally minimal compared to tools like ColorFlow. Reach for this specifically when speed matters more than advanced controls like shader effects or curve handles.