Free Software
This selection of software is eitehr "Open Source" or it is a program that is free to download, install and use.
Portable software
These are programs that you can install and run from your flash drive. This means that you can use them on almost any PC that you use without having to download and install the programs first. (You will probably want to use a flash drive that is 1Gb or larger www.7dayshop.com)
Online Software
These programs run on the website, they are often called Web
2.0 applications. You can use them on any computer connected to the
internet (that has the latest versions of flash, shockwave, java etc.
but the website will let you know what you need to do if it
will not run)