Limits world generation size to a specific maximum. While creating a new world, world size can be selected from Infinite, 256, 512, 768, 1024 and 2048. The aim of this project was to create similar limited worlds that were in legacy console edition.
For now, I have only tested this mod in singleplayer b1.7.3 and it might not be compatible with other mods or game versions. For now, initial spawn location is also always at (x=0, z=0) as some of the small worlds don't always have otherwise suitable spawn locations.
Installation is similar to how other beta mods are installed: By modifying the JAR file. I would recommend using the MultiMC launcher or something similar to make this easy.