mm-devise – Devise – MongoMapper

dm-devise – Devise – DataMapper

devise-couch – Devise – Couch DB

devise-ripple – Devise – Riak

cequel-devise – Devise – Cassandra

devise-encryptable – adds support of other authentication mechanisms besides the built-in Bcrypt (the default).
https://github.com/plataformatec/devise-encryptable

devise_aes_encryptable – AES-256 Reversible Encryption
http://github.com/chicks/devise_aes_encryptable

devise-argon2 – Support for Argon2i
https://github.com/erdostom/devise-argon2

devise_campaignable – Have your users automatically added to a mail campaign tool of your choice. Currently supports MailChimp but easy adaptation for CampaignMonitor. https://github.com/SirRawlins/devise_campaignable

devise_mailchimp – MailChimp integration for Devise making it effortless for users to join mailing lists when they register their account.
http://jcnnghm.github.com/devise_mailchimp/

devise-api – It provides support for access tokens and refresh tokens, which allow you to authenticate API requests and keep the user’s session active for a longer period of time on the client side
https://github.com/nejdetkadir/devise-api

cantango – Integrates Devise, Roles and CanCan with Permits for a Rails 3 app
http://github.com/kristianmandrup/cantango
(Replaces cream, http://github.com/kristianmandrup/cream)

invitable – Adds support for send account invitations by email.
http://github.com/scambra/devise_invitable

devise_traceable – Tracing Devise Model (Model Stamp login and logout)
http://github.com/shenoudab/devise_traceable

devise_last_seen – Ensure that devise will update a flag/timestamp on the model whenever a user is authenticated.
https://github.com/brunoocasali/devise_last_seen

devise_lastseenable – Just adds a last_seen datetime that’s updated whenever authenticate! is called (not maintained).
https://github.com/ctide/devise_lastseenable

devise_security – Add “enterprise” functionality (strong passwords, password expire…, new: captcha support)
https://github.com/devise-security/devise-security

devise-basecamper – Add basecamp-style subdomain scoped authentication
https://github.com/digitalopera/devise-basecamper

devise-passkeys – Tiddle-style devise extension for passkeys support
https://github.com/ruby-passkeys/devise-passkeys

devise-two-factor – Barebones two-factor authentication support
https://github.com/tinfoil/devise-two-factor

two_factor_authentication – Add two factor authentication, like Gmail
https://github.com/Houdini/two_factor_authentication

devise_account_expireable – Expire a user account at a specific date / time.
https://github.com/j-mcnally/devise_account_expireable

devise_uid – Add UID support to Devise. A lot of times, we want a unique ID representing the user model instead of its incremental ID in the database, for example, in API instead of exposing the primary key, we use a random generated unique string to indentify this user.
https://github.com/jingweno/devise_uid

devise_session_expirable – Devise timeoutable’s paranoid cousin. Enforces time-limited sessions by rejecting sessions which are not timestamped.
https://github.com/teleological/devise_session_expirable

devise_zxcvbn – Reject weak passwords using zxcvbn.
https://github.com/bitzesty/devise_zxcvbn

devise_invalidatable – Invalidate sessions from the server-side.
https://github.com/madkins/devise_invalidatable

any_login – easy login with any user to make your development life easier.
https://github.com/igorkasyanchuk/any_login

devise-verifiable – Adds a second step to Devise’s signup process. Useful if you want to collect extra information or verify user’s identity through a 3rd-party service. github.com/Rodrigora/devise-verifiable

honeybadger – When used together, exceptions reported to honeybadger will automatically be associated with the current Devise user.
https://github.com/honeybadger-io/honeybadger-ruby

devise-uncommon_password – Prevents a user from using a password in the list of the 100 most common passwords.
https://github.com/HCLarsen/devise-uncommon_password

devise-pwned_password – checks user passwords against the PwnedPasswords dataset.
https://github.com/michaelbanfield/devise-pwned_password

devise_date_restrictable – restrict a user’s account by date range (valid from/until/between).
https://github.com/jonpearse/devise_date_restrictable

devise_slack_notifiable – slack notifications for registrations and confirmations
https://github.com/invoicity/devise_slack_notifiable

castle_devise – prevent bot registrations and account takeover attacks with Castle
https://github.com/castle/castle_devise

devise-browserid – Adds support for Mozilla Persona / BrowserID authentication.
https://github.com/ringe/devise-browserid/

facebook_connectable – Adds support for Facebook Connect authentication, and optionally fetching user info from Facebook in the same step.
http://github.com/grimen/devise_facebook_connectable

oauth2_authenticatable – Adds support for OAuth2 (Facebook Graph) authentication.
http://github.com/bhbryant/devise_oauth2_authenticatable

oauth2_providable – Adds an OAuth2 authentication layer to protect API resources.
https://github.com/socialcast/devise_oauth2_providable

devise-twitter – Adds Sign in via Twitter and Connect your account to Twitter functionality
http://github.com/MSch/devise-twitter

imapable – Adds support for authentication via IMAP, a great solution for internal application where no LDAP server exists.
http://github.com/joshk/devise_imapable

ldap_authenticatable – Adds support for LDAP authentication via simple bind.
http://github.com/cschiewek/devise_ldap_authenticatable

devise_pam_authenticatable2 – Adds support for PAM authentification
https://github.com/devkral/devise_pam_authenticatable2

rpx_connectable – Adds support for RPX authentication. RPX provides free and paid services to handle many authentication providers (facebook, twitter, OpenID…) using a single API.
http://github.com/slainer68/devise_rpx_connectable

cas_authenticatable – Adds support for single sign-on via CAS and CAS-implementing servers.
http://github.com/nbudin/devise_cas_authenticatable

openid_authenticatable – Adds support for OpenID authentication.
http://github.com/nbudin/devise_openid_authenticatable

devise_paypal – Adds support for Paypal authentication
http://github.com/dwilkie/devise_paypal

devise_google_authenticator – Adds support for Google’s Authenticator
http://github.com/AsteriskLabs/devise_google_authenticator

devise_shibboleth_authenticatable – Adds support for Shibboleth
https://github.com/jgeorge300/devise_shibboleth_authenticatable

devise-radius-authenticatable – Adds support for authenticating against radius servers
https://github.com/cbascom/devise-radius-authenticatable

devise-jwt – JWT token authentication with devise
https://github.com/waiting-for-dev/devise-jwt