Apache Ivy can publish a set a files to a machine somewhere and then someone else can fetch them down with a command in an Apache Ant build script.
For example, Developer A publishes a jar and javadoc of Project Z at version 1.0. Developer B pull that down to use. Meanwhile, Developer A adds new features to Project Z as version 1.1. Developer B can take down those changes whenever ready.
Create a ivy.xml pointing at the files you want in the repo, say HELLO.txt.