A fork of NuVotifier with Redis forwarding support, a standalone server implementation and Sponge 11+ support. From the original README:
Useful resources

• Setup Guide
• Troubleshooting Guide
• Developer Information

Supported platforms
AzuVotifier is currently supported on the following platforms:

• CraftBukkit, Spigot, Paper, Pufferfish or Purpur (1.8.8+)
  • Older versions might work but no support will be provided
    
  • Any fork without significant breaking changes should also work
• Sponge 11 (1.20+)
  
• BungeeCord/Waterfall
  
• Velocity

It can also run as a standalone application.

Running
You can get the latest release directly from GitHub or Modrinth. Then, follow the instructions for your server software or the standalone version:

Bukkit, Sponge, BungeeCord and Velocity
Drag and drop the downloaded JAR into your `plugins/` folder. You should've downloaded the JAR that has your server software in its name.
If you've done everything right, it should work out of the box. If it doesn't, feel free to ask for help here.

Standalone
Open up the terminal, go into the directory the previously downloaded JAR is at, and then run it like this:
You can also use command line arguments to configure some settings, such as the hostname:
To get a full list of options, run:
Standalone with Docker
A Docker image for the standalone NuVotifier implementation is available at Docker Hub. To pull it, run:
You can then run the image using a command like:
This will:

• Expose port 8192 on the host machine;
• Map /etc/nuvotifier (host) to /app/config (container) using bind mounts;
• Restart the container automatically unless stopped;
• Name the container nuvotifier;
• Use the azurejelly/standalone-nuvotifier:latest image;
• And pass --port 8192 as a command line argument to NuVotifier.
  • Not required as 8192/tcp is already the default port, but helps to show that you can pass arguments such as --port or --config.

If you want to use Docker Compose, an example docker-compose.yml file is available on the repository.

License
AzuVotifier is GNU GPLv3 licensed. This project's license can be viewed here.