-
devise-security
A security extension for devise, meeting industry-standard security demands for web applications.
-
Scout Monitoring
Rennaisance engineers rejoice! 1 gem 5 min to app monitoring. 5-minute onboarding. No sales team. Devs in the support channels. No DevOps team required. Get the free app insights every engineer deserves with Scout Monitoring.
I didn't create it, it was created by Jeremy Evans, I just contribute to it occasionally ;). I created the Rails integration, because I wanted to bring it into the Rails ecosystem, and I recently started recording screencasts. So I'm biased in that sense :)
Rodauth is IMO the most feature-complete and the most stable. It ships with "enterprise"-grade features such as single session, session expiration, password expiration, password complexity requirements, disallowing common passwords, and disallowing password reuse (basically what devise-security extension provides).
SSO isn't necessarily provided through a third-party service. There are self-hosted solutions like https://www.keycloak.org/ for example.