Have you ever tried of placing rails and having trouble with minecart unable to go up? This mod is for you.
This mod adds 5 new blocks:
Hardened glass: Crafting item, blast resistance
Player Sender / Reciever: Sending player and reciving player.
Viapipe: Connect sender and reciever.
Player Teleportor: Teleport and recieve player without viapipe.
Here, the recipe of: Viapipe, hardened glass, player reciever, player sender, player teleportor

Here are some tutorials:
Player sender, Player reciever, viapipe usage:

The viapipes (green blocks) connects the sender (purple with red in middle) and the reciever (puprle with blue in middle). Once you right click the sender, the sender will find a reciever that is connected to it with viaducts and teleport you to the reciever. If you do not have a reciever installed, it will still teleport you but will cause an explosion.
Teleportor usage:

As you can see, I have placed some teleports on different blocks (diamond blocks, wooden stairs and dirts). Once you right click a teleportor, it will find all the teleports in the server, even in different worlds, and check if the teleportor shares a common block underneath (metadata, or directions does not matter). If the teleport and the another teleportor shares a common block underneath, it will teleport you to that teleportor.
For example, if I right click one of the teleportor with a diamond block underneath, it will teleport me to another teleportor with a diamond block underneath.

