ListBlender
A utility class to blend lists of lists into a single list. This is an implementation of the list blending algorithm described at https://gist.github.com/clinejj/8568197. It uses a simple round robin selection to blend the lists together. The class to use is: https://github.com/clinejj/ListBlender/blob/master/src/co/pixeltron/util/ListBlender.java
This doesn't require any extra dependencies outside of core Java.