A nice overview of warm-ups and energizers can be found here: https://www.mural.co/blog/online-warm-ups-energizers
Mischief Makers Facilipedia
Library of facilitation techniques
I came across this page where you can find a lot of energizers, games and other facilitation techniques: https://www.sessionlab.com/library/energiser
100 energizers
Find them here: https://www.slideshare.net/vickthorr/100-energizers
15 Fun classroom energizers for students.
Free games, templates, formats and inspiration for Scrum Teams
Find a collection of free games, templates and format created by Christiaan Verwijs & Barry Overeem : https://medium.com/the-liberators/free-games-templates-formats-and-inspiration-for-scrum-teams-11f40e3fcb22
Facilitation Toolbox
A nice Trello board from The Liberators that holds a lot of cool ideas to help you facilitate as a Scrum Master. Find it here: https://trello.com/b/oC3oBEvY/facilitation-toolbox