Well then that sucks. In only found these and i don't know if they work. They are obviously a bit different as well so not sure if they work in the same way the mods were intended.
A lot if not all of these mods are client side only or forge plugins which are not compatible with our servers.
You need to look at plugins that are spigot compatible for us to install. You can find these on spigotmc.com
Changing to forge is basically building an entire new server.