AdvancedCore

https://www.spigotmc.org/resources/advancedcore.28295/

License

Creative Commons Arttribution 3.0 Unported

https://github.com/Ben12345rocks/AdvancedCore/blob/master/VotingPlugin/LICENSE.txt

Maven:

<repository>
    <id>jitpack.io</id>
    <url>https://jitpack.io</url>
</repository>

<dependency>
    <groupId>com.github.Ben12345rocks</groupId>
    <artifactId>AdvancedCore</artifactId>
    <version>LATEST</version>
    <scope>compile</scope>
</dependency>

Versions:
LATEST - latest stable release
BRANCH-SNAPHSOT - unstable builds