Plugin name: MCDonate.
Plugin link: https://www.spigotmc.org/resources/mcdonate.72696/
Description: MCDonate add feature to the server, who can help get items or donate. For example, player need donate to get new item on server, he goes on this site who server owner give, and he can select donate for example Enchanted Diamond Sword - 2$.
This is great way, to make on server donates.
Thank you, have a good day! 
