Bukkit

"Is their a tekkit item list?"

The question leads me to want to find out if custom items are supported. At the moment, I have no reason to think they wouldn't be, but no evidence to suggest anything either way.

I don't use tekkit or spout. Theoretically, since WhatIsIt bases it's names off the type and data ids, any item would be supported except custom potions since the potion logic is based on how Minecraft uses them and not how a plugin might.