FreeOTP+ is described as 'Open-source Android app for two-factor authentication with material design, backup and restore options via files or Google Drive, and TOTP/HOTP support' and is a Authenticator in the security & privacy category. There are more than 50 alternatives to FreeOTP+ for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Mac apps. The best FreeOTP+ alternative is Bitwarden, which is both free and Open Source. Other great apps like FreeOTP+ are Proton Authenticator, Aegis Authenticator, Ente Auth and Bitwarden Authenticator.
2faConsole is a lightweight, cross-platform two-factor authentication (2FA) console application built with C# .NET. It uses the dependency-free Pxoqxo.Otp2fa library to provide secure, terminal-based OTP management.
A simple application for multi-factor authentication, written in HTML using jQuery Mobile, jsSHA, LocalStorage and Application Cache. It implements the TOTP (Time-Based One-Time Password) algorithm according to RFC6238 and has been tested to work with Google Authenticator...
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