— Toggles a lever
[Device] — Temporarily turns on a lever
[DeviceItem] — Temporarily turns on a lever using items as payment
[Jukebox] — Allows players to create jukeboxes by placing music discs in a chest
[Restricted] — Makes it so only certain permission groups can use the linked SignShop (listed on lines 2, 3, and 4)

Admin Signs
Require OP or SignShop.Admin.* to create

[gBuy] — Buy an item from the shop chest, but the owner receives no money
[gSell] — Sell an item to the shop chest, and the player receives money, but not from the owner
[iBuy] — Buy an item from the "shop", money goes to no one, infinite items
[iSell] — Sell an item to the "shop", infinite money, item disappears
[iTrade] — Trades one set of items for another, infinite stock
[Class] — Takes the user's inventory and replaces it with items from a chest, infinite stock
[Kit] — Gives the buyer a set of items once (infinite stock), must be reset using ResetKit sign before they can use it again
[ResetKit] — Allows a player to use a Kit sign again
[iBuyXP] — Buy the number of XP levels on the third line of the sign
[iSellXP] — Sell the number of XP levels on the third line of the sign
[iXPBuy] — Buy an item using raw XP points on the third line of the sign
[iXPSell] — Sell an item using raw XP points on the third line of the sign
[iSlot] — Gives a random item from the selected chest items with infinite stock
[Day] — Turns the time to day
[Night] — Turns the time to night
[Rain] — Turns on rain + thunder
[ClearSkies] — Turns off rain + thunder
[Repair] — Repairs the current item
[Heal] — Fully heals the player
[Enchant] — Sells the enchantments from the item in the chest
[Disenchant] — Removes enchantments from an item
[TpToOwner] — An example of a custom sign for running commands
[Command] — Allows players to run commands on the 2nd and 3rd lines of the sign
[UserCommand] — Allows players to run commands on the 2nd and 3rd lines of the sign as if they typed it themselves
[Promote] — Promotes players to the permission group listed on the 2nd line of the sign

If the sign you are looking for isn't here, you can create custom signs in the config. Just add it to the signs: section and give it the appropriate blocks. Check out the SignShop Quick Reference in your plugins/SignShop folder for help.