I'm also an artist who loves to get my hands into nifty programs like Esoteric Software's Spine! With this tool I can generate interactive HTML5 canvas elements. Because of CORS limitations, I'm basically required to host my experiments myself if I want to share them with anyone. That's why I'm here!
Spine provides what I need to create refined 2D animations. It allows me to bend and deform images with mesh skinning/weights, adjust timing with a dopesheet, visualize motion with ghosting, pose characters with inverse kinematics, create pseudo 3D effects, and much more! I now have an efficient workflow both for creating amazing animation and for integrating it into my projects via their available runtimes.
Try patting the top of this little guy's head or poking his tail!!