Designing [micro-] interactions

From LI UX / CX / Product / Strategy Group

“What is the best tool for designing animations and micro interactions?” – Several products popped up in the replies that look interesting: https://www.flinto.com/, http://principleformac.com/ (super interesting), https://www.paintcodeapp.com/, and http://origami.design/ [have heard of but not used – Sketch integration looks good]