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 A curated list of awesome Java frameworks, libraries and software.
 
+* [OTP-Java](https://github.com/BastiaanJansen/OTP-Java) - One-time password generator library according to RFC 4226 (HOTP) and RFC 6238 (TOTP).
 * [CyC2018/CS-Notes](https://github.com/CyC2018/CS-Notes) - :books: 技术面试必备基础知识、Leetcode、计算机操作系统、计算机网络、系统设计、Java、Python、C++
 * [Snailclimb/JavaGuide](https://github.com/Snailclimb/JavaGuide) - 「Java学习+面试指南」一份涵盖大部分 Java 程序员所需要掌握的核心知识。准备 Java 面试，首选 JavaGuide！
 * [iluwatar/java-design-patterns](https://github.com/iluwatar/java-design-patterns) - Design patterns implemented in Java