Here are some websites where you can find free backgrounds for your next project:

1. FFFuel - A website offering a collection of free backgrounds.
2. BGJar - Explore a wide range of free backgrounds for your projects.
3. Haikei - Create unique and customizable backgrounds for your designs.
4. Gradienta - Find beautiful gradient backgrounds for your next project.
5. Meshgradient - Discover and download mesh gradient backgrounds.
6. Hero Patterns - Access a library of repeatable SVG background patterns.
7. WebGradients - Browse and download gradients for your website or design.
8. Cool Backgrounds - Get cool and trendy backgrounds for your projects.
9. SVG Backgrounds - Find SVG backgrounds to enhance your designs.