This site is not for solicitation of services or 'purchasing' development. Please do not post requesting side mods/plugins and so on. Your thread will be removed, and you will receive a warning.
http://files.minecraftforge.net/spongepowered/
Plugins can be found here:
https://forums.spongepowered.org/c/plugins
The one you're looking for is an essentials plugin, there are several:
https://forums.spongepowered.org/t/esse ... /8576/1805
https://forums.spongepowered.org/t/beta ... /11792/290