Blast: Clears out a 3x3x# area Hellforged: Repairs items as you walk Furnace: Smelts mined ore Implants: Feeds you There might be more but these are what I remember, also make sure to use /transfer with the item in your hand to activate the custom enchant.
There's also Excavation - Blast for a Shovel Doctor - Heals when you shoot an arrow Gears - Increased Movement Speed AntiGravity - Heightened Jump There's likely a few more but I forget.
For some reason none of the enchantments work for me, like when I use a pickaxe that has blast 2, it only breaks one block, I don't know if I'm doing it wrong or what.
Here is a list Demetri made a while back regarding custom enchantments: peacefulfarms.net/threads/custom-enchantments.15858/