Other minor projects, code snippets, etc, will be posted here, in due time.
Interested in a web application instead?
See the Lacinato WebABX/Shootouter.
Lacinato ABX is the only cross-platform ABX and shootout blind testing software for audio. It allows double-blind ABX testing of audio files (seeing if you can tell which file is being played), as well as "shootouts" (picking your favorite from a shuffled, anonymized list). Or you can just use it as a convenient way to switch between files (maintaining the current play position, if you like.) It is free to download and use (see license.). Although it's Java-based, you do not need to install Java to use it. Runs on Linux/Windows/Mac.
This code calculates the exact binomial distribution function. Since the factorials can generate huge numbers, it's necessary to use BigDecimal, BigInteger, etc.
You can download the jar (with source).
You can download the .java source.