◇ Could this help me?
Yes. These are well-known, widely-used, reputable open-source animation libraries, and reaching for a mature library instead of hand-rolling complex scroll or WebGL effects is sound front-end practice that saves time and improves quality. This is a general web-design technique rather than a project-specific change; still, treat each as a normal third-party dependency by checking its maintenance, license, and reputation before adding it, which the Instruction and prompt build in.
I want to add polished animation effects to my website using free open-source libraries. I'm considering these four: lenis (smooth scroll), GSAP (general scroll, text, and UI animation), Vanta (WebGL 3D animated backgrounds), and react-bits (copy-paste React animation components). For each one, research what it is, how it works, who maintains it, its license, and whether it is reputable and safe to depend on, then summarize the findings. Recommend which fits my use case, and add or install it only after I explicitly approve, then show me a minimal integration example.