Edrys

Allows educators to build classes by combining modules or create custom ones with a real-time API, enabling features like whiteboards, polls, and remote Arduino programming as highlighted in the README.

Uses passwordless authentication and stores minimal student personally identifiable information, aligning with strict privacy requirements mentioned in the features list.

Can be started quickly with Docker or Deno, requiring no databases or complex dependencies to set up, as emphasized in the 'Easy to start' feature.

Fully free and open-source with no paywalled features or vendor lock-in, ensuring full control and customization as stated in the philosophy.