A Java matrix library that is free and open source.
One of the best features of jMatrices is how well its operations are distributed. Unlike other libraries that may expose an all-in-one Matrix class, jMatrices keeps things much simpler. You'll find that this makes it much easier to use and customize, even if you're still tinkering with the fundamentals of Matrix Theory.
And, while it's worth noting that jMatrices is licensed under the GNU Library or Lesser General Public License (LGPL), this shouldn't deter you. You'll find that this software offers everything you need for working with matrices, all with an intuitive and easy-to-understand interface that won't disappoint.
Version 0.6: N/A