MinecraftTool essentially makes the interface of being an admin of a server much easier. Instead of searching through a text file to change the server properties, or to add an OP, its a windows format of tabs and buttons that add functions such as: updating the server with a button, adding and removing OP's, running the server at a set amount of RAM to reduce laggy computers, downloading and creating all server material automatically, and much more. Of the small amount of people that use it already, it helps them enormously. There is a bukkit version Too! however, it has no bukkit functionality. It has the same functionality of a normal server, it just doesn't automatically download the server jar, nor does it update for you.
Just put it in a folder, open it, and let the server begin.
Heres a screen shot:
Here's a download:
Normal:
MinecraftTool_1.4
Bukkit:
MinecraftTool_Bukkit_1.4