Teleport to a place with a click of a button! The Teleporter Tools mod allows you to teleport to places using an item. Just click on a nearby block, and you're there! The teleporters come in Iron, Gold, Diamond, and Obsidian. The mod is now open source, and the source can be found on GitHub.
The recipe to make an Obsidian Teleporter
Requires ModLoader to play. Download the zip, unzip it, and put all of these files into the file "minecraft.jar."