If You Like Old-School Ultima Online and Minecraft, Check Out Knights of Minecraft
Knights of Minecraft is billed as a “Hardcore OpenWorld Exploration RPG Dedicated Server” for Minecraft. It draws its inspiration from Ultima Online, and also borrows some ideas from the Legend of Zelda games. The developers aim to create a dedicated RPG server, and hope to offer a somewhat different experience from what even experienced Minecraft players are used to. The list of planned features includes: crafting, building structures, attacking and conquering other players’ lands, and even PvP/player-killing.
At present, several player skills have been wholly or partially implemented, as have features such as lockpicking, tree growing and harvesting (lumberjacking), alchemy, hiding and stealth, and player housing and guilds.
And, of course, there’s a project entry for it.