MathTools is written in Java, so installation is really not an issue. Simply unzip the archive and you're ready to go. Java 1.6+ is required and MathTools was built using version 1.6.0_25 so it should run under that version or later.
The zip archive contains everything needed to use or build MathTools:
All of this is contained within the archive root folder MathTools_J6. If you are not interested in building from source the src directory can be deleted. Likewise the javadoc folder, but don't do it!
MathTools can be run from the command line or from a GUI. To run from the command line:
The demo frame should appear within a few seconds.
Running from the GUI assumes your operating system recognizes executable JARs. If this is the case, open the MathTools_J6 folder and double-click the JAR file. After a few seconds to initialize the demo frame will appear.