You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
Easy integration with OAuth 2.0 service providers.
WordPress plugin to provide an OpenID Connect Generic client
FusionDirectory is a modern, efficient and secure Identity Management (IAM) solution.
[Laravel 5.4+] An integration to add SSO to your service via SAML2 protocol based on OneLogin toolkit with support of multiple Identity Providers