- Spotify has some great content on theirs. They also share some really good figma templates with a lot of their posts. – https://spotify.design/
- This one by Invision https://www.designbetter.co/
- Basecamp has a pretty interesting Employee Handbook https://basecamp.com/handbook
- Atlassian and their Plays https://www.atlassian.com/team-playbook
- Dropbox Design https://dropbox.design/
- Shopify UX https://ux.shopify.com/