This mod add conveyors to the game, with different options for connectivity. There is a wrench that I am still working on, to rotate the conveyor.

You can craft the with iron, redstone, and rails.

The basic conveyor is this recipe

redstone, rail, redstone
iron, nothing, iron
nothing, nothing, nothing

The 2 curves are like this, 1 is flipped diagonally

Iron, Redstone, Nothing
Nothing, Rail, Redstone
nothing, nothing, Iron

The 3-way is like this:

nothing, nothing, nothing
iron, rail, iron
redstone, redstone, redstone

and the 4-way like this

nothing, redstone, nothing
iron, rail, iron
nothing, redstone, nothing