Obviously depends on the type of animation, but you have far more control with software designed for this type of work, like After Effects. Bodymovin should help you achieve a similar result to the site you mentioned.

HI Kevin, if you are looking for something with regular updates and a great support then GreenSock will be your best bet.

Here is a quick deconstruction of some of the effects from waaark.com, hope that helps.

Waaark.com deconstruction

Benjamin De Cock from Stripe created this usefull one : https://github.com/bendc/animateplus

This hasn't been released yet. But waiting patiently for this one: Spirit JS

The State of SVG Animation by Sara Soueidnn http://blogs.adobe.com/dreamweaver/2015/06/the-state-of-svg-animation.html#.VXGQW1yqqkq

Dmitriy the creator of Snapsvg has been featured twice on the svg-immersion podcast (incredible u should listen). During one of the shows he mentions that the core of SnapSVG is done, so the lack of commits are mainly just bug maintenance. In his mind, the community should sorta build ontop of snap now their own animation systems. There are discussion on the podcast where some people use a mix of snapsvg and greensock. Though most people just end up using Greensock as it has a solid interface and helps address the cross-browser issues that arise when using the transform-rotations.

Had not heard about SpiritJS and have to say it looks cool.

MorphSVG from GreenSock!

Here's a codepen of something I built using their plugin.

Link

The future of animation cannot possible be about JavaScript libraries and code. There have to be tools like After Effects or Principle but for real and interactive animations! This seems like a huge blindspot right now.

It's showcased on the GreenSock site as an example http://greensock.com/examples-showcases