Animations on scroll are awesome. I've mostly used the powerful ScrollMagic and GSAP combo but with the first, I'm noticing more and more bugs and problems with browser support, especially mobile devices. The ScrollMagic library has not been updated for a while and currently has over 300+ outstanding issues.
What other options are there that are as versatile as ScrollMagic and well maintained? WOW hasn't been updated for the last 2 years either.