Open Knowledge Foundation: https://okfn.org/
Worldwide non-profit network focused on making openness a mainstream concept through advocacy, technology, and training.
Open Data Institute: https://theodi.org/
Non-profit organization which trains, supports, and collaborates with people around the world to promote innovation through open data.
FAIR Principles: https://www.nature.com/articles/sdata201618
Open Knowledge Foundation Open Data Handbook: http://opendatahandbook.org/guide/en/what-is-open-data/
Project Open Data: https://project-open-data.cio.gov/principles/
Sunlight Foundation: Empowering the Open Data Dialogue: http://sunlightfoundation.com/blog/2013/10/22/empowering-the-open-data-dialogue/