Apache InLong - a one-stop integration framework for massive data
Vaadin 6, 7, 8 is a Java framework for modern Java web applications
Sudoku Explainer Java (Swing) GUI explains how to solve Sudokus
Naive AI Aided Sliding Puzzle Game
A java implementation that generates wang tiles from any input image.
Real Time Puzzle Videogame
Place n queens on nxn board without conflict.
Swap messed up puzzle pieces to restore a primary picture.
Nurikabe, a great game.