Official Android implementation of a modern two-factor authentication
A free, secure and open source app for Android
Source code for 2FAS Auth Android app
iOS client for Proton Authenticator
Source code for 2FAS Auth iOS app
FIDO® Certified StrongKey FIDO Server (SKFS)
A Java-based LDAP API
Open source two-factor authentication for Android
Forget passwords, use a fingerprint scanner or facial recognition
Token-based AngularJS authentication