Tommi on GitHub - https://github.com/ikitommi

Tommi on Twitter - https://twitter.com/ikitommi

Metosin's website - https://www.metosin.fi/en/

Metosin on GitHub - https://github.com/metosin

Malli - https://github.com/metosin/malli

Prismatic Schema - https://github.com/plumatic/schema

Clojure Spec - https://github.com/clojure/spec-alpha2

Video Courses:

https://www.LearnReitit.com

https://www.LearnReFrame.com

https://www.LearnReagent.com