SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

```➜  supertokens-root git:(master) ls core
annotations-13.0.jar               jackson-annotations-2.10.0.jar     jackson-dataformat-yaml-2.10.0.jar logback-core-1.2.3.jar             sqlite-jdbc-3.30.1.jar
core-2.4.0.jar                     jackson-core-2.10.0.jar            jsr305-3.0.2.jar                   slf4j-api-1.7.25.jar               tomcat-annotations-api-8.5.47.jar
gson-2.3.1.jar                     jackson-databind-2.10.0.jar        logback-classic-1.2.3.jar          snakeyaml-1.24.jar                 tomcat-embed-core-8.5.47.jar
➜  supertokens-root git:(master)```