I got this Hub plugin from Mineplex. It manages pets, gadgets, news, parkours, parties and includes a tutorial, a server jump function and other useful functions. You can test it out on the official Mineplex server for which it was made.
The code is good but you need to modify it to get the plugin running. You can simply decompile it and maybe use it for your own. (JD-GUI is a good decompiler).