Tekkit Classic for Windows

The description of Tekkit Classic - Play With New Friends

Alter the world, traverse its skies and dive into its seas. Use technology and magic to build and destroy as you see fit, with your friends and against your enemies. The greatest mod content for Minecraft, wrapped up in a neat, easy to run, self-contained Bukkit-enabled package. That’s right, the self-contained Tekkit server is Bukkit at its core, allowing you the entire Bukkit plugin catalog to be run with Tekkit.