Pipes!

Compatibility module for BuildCraft. NOT included in buildcraft in earlier versions (buildcraft-version.jar or buildcraft-version-main.jar), IS included in buildcraft-version-all.jar)

Heavily stripped down port of BuildCraft's "transport" module

Core module of BuildCraft, included in the main jar by default.

Factory module for BuildCraft

Energy module for BuildCraft

Transport module for BuildCraft

Builders module.

Silicon module for BuildCraft

Robotics module for BuildCraft.