Best site for plugins?

Hi there! I ever used http://modlist.mcf.li/ there are plugins for many versions of mincreaft

you can try this brooo https://www.spigotmc.org/resources/

As others have said Spigot has the best selection of plugins atm at https://wwww.spigotmc.org/resources/

Bukkit is the best for me I have a server for 4 years and I use it

If you want some paid quality plugins, you can use songoda, other than that, go for spigot.

The best site for purchased plugins is McMarket and if you are going for the free ones then it is Spigot