McMMO is a plugin where you can level up skills in several categories such as Swords, Bows, Mining and even Fishing. You get access to special skills in each category that also get stronger with each level. Server Shops allow for players to buy various items using a currency from an Economy plugin. Shops can be set by server operators to dispense unlimited items (Server Shop or Admin Shop) or by other players (Player Shops). Player Shops have to be actively maintained by players by keeping stock on goods and even paying rent for designated shop spaces.
McMMO, Towny, and sign shops are the trappings of the ultimate comfy Minecraft server