http://sangria-graphql.org/
https://github.com/sangria-graphql/sangria

http://sangria-graphql.org/getting-started/
http://sangria-graphql.org/learn/
http://sangria-graphql.org/community/

http://try.sangria-graphql.org/

presentations:
2017:
https://jeremie.astori.fr/graphql-nescala
https://jeremie.astori.fr/talks/2017-03-24-graphql-nescala
https://www.youtube.com/watch?v=6ttypoLyRaU

2015:
https://www.youtube.com/watch?v=j4q4Phsczes