PackUpdate

Now maintained again by Kilobyte22

WTF?

A simple program that downloads and updates modpacks automatically. It was written to work directly as a pre-launch command for MultiMC and features

How?

For a detailed explanation on how to set up PackUpdate see the Wiki

How to build?

Install Scala and SBT, then run sbt assembly. This will produce a standalone jar. For development you can use IntelliJ Idea with the scala plugin, which has native support for sbt