Tools and packages that are used for countering forensic activities, including encryption, steganography, and anything that modify attributes. This all includes tools to work with anything in general that makes changes to a system for the purposes of hiding information.
OpenID Connect, the authentication protocol and identity layer on top of OAuth 2.0 used in many SSO and adopted in many social logins (Apple, Facebook, Google, ...etc). Find this curated list of providers, services, libraries, and resources to adopt it and know more about existing specs.