Cargo

Cargo is a simple mod that adds only one block, the cargo block.

Place a cargo block in any water biome (including beaches) and place another a boat ride away.

Click on one to set the destination, then the other to set the origin.

A time will be calculated and a small boat (you may need to relog if you are using any version before 1.1.0) will appear taking cargo from the origin to the destination