Utilities

Uberbukkit lets you run the majority of b1.7.3 plugins on earlier beta versions. Currently supports b1.0 to b1.7.3.

Report bugs on the Github repo.

NetherMP is an a1.2.1_01 (a0.2.3) server mod that enables Nether dimension in vanilla multiplayer.

No longer supported!

VersionMirrorer downloads all Java Edition versions from the Mojang servers and checks for the updates. Reupload-proof.

Beware: enormously high CPU usage in v1.x versions, to be fixed in v2.