The mod adds a single item: a spring!
Connect boats, minecarts and living entities together with a "spring"*!
*Physics may not apply
Select the 'dominant' entity (the one that will pull the other) first and then select the 'dominated' to create a spring between the two!
(The dominated side of the spring will appear redder than the dominant part)
Warning: the spring makes the minecarts always push one another, therefore stopping them may prove difficult.
Curse project page: https://minecraft.curseforge.com/projects/entity-spring
GitHub project: https://github.com/jglrxavpok/Entity-Spring
Download: https://minecraft.curseforge.com/projects/entity-spring/files (select the lastest version available for your Minecraft version)
Moderator on the French Minecraft Forge Modding community