It is my firm believe that the larger a program is the more that can go wrong. RollingMinecarts is a fine example of a "not more than you need" plugin. Written to be extremely small and efficient.
A shorter version of the cover image.
Description
RollingMinecarts - Empty minecarts move at the same speed as occupied minecarts.
This small mod alters the behavior of unoccupied and storage minecarts so that they behave just like occupied minecarts. No longer must you use excessive booster tracks just to get a storage cart to get from one place to another. The chunks the minecarts are traveling will even stay loaded so that the cart can safely make it to it's destination. Just drop it in the plugins folder and you're good to go!
Features
Storage carts move at the same speed as occupied carts. (configurable)
Empty carts move at the same speed as occupied carts. (configurable)
Keeps chunks around moving minecarts loaded. (configurable)
Commands to count, as well as remove all (or empty) minecarts.