I gave an introductory presentation about Riot.js some time ago. It was called “Introduction to Riot.js: a powerful minimalistic UI DOM library with clean and concise syntax”.
Many people at the presentation didn’t knew about Riot.js and were pleased about his functionality, simple style and how fast you can have something working.
The presentation outline is this:
The presentation (Updated for Riot.js v3.2.0) is full of simple live examples in plunker so you can play and understand as you read the presentation.
If you are interested in Riot.js here are some other posts that can help you get started