This site is a playground for experimenting java programmers. Browse hundreds of user created examples or get your class to make their own. It's easy.
http://ictmagic.wikispaces.com/ICT+&+Web+Tools
Minecraft is an award winning building game and something of an educational phenomenon. It's an addictive game where players build a 3D landscape by adding and destroying blocks. Play this free java version to get your class creating and imagining. No registration required. Play the multi-player version at http://www.minecraft.net/classic/list, but a free registration is needed to play as a team.
http://ictmagic.wikispaces.com/ICT+%26+Web+Tools
"Free tutorials using java applets to explore, interactively, important topics in precalculus such as quadratic, rational, exponential, logarithmic, trigonometric, polynomial, absolute value functions and their graphs. Equations of lines, circles, ellipses, hyperbolas and parabolas are also explored interactively. Graph shifting, scaling and reflection are also included. The definition and properties of inverse functions are thoroughly investigated. A graphical approach to 2 by 2 systems of equations is included. "
A java based maths number grid with lots of options. Hide numbers with Monty the snake and change between a hundred square and multiplication square.
http://ictmagic.wikispaces.com/Maths