JExpert 

JExpert is a free test simulation engine based on the latest pattern of Sun's Java Programmer Certification. The simulator contains a large number of questions and mock exams.
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Virtual Flower 

Create flowers and geometrical patterns in 3D. Watch them grow or unfold. A swirling pattern of stars suddenly coalesces into a geodesic sphere with all the points gracefully touching. Files are tiny, 4 - 5 KB usually, suitable for web pages.
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Fractal Flurries 

Snowflakes... no two are ever alike. The Fractal Flurries screen saver displays endless falling snow over whimsical winter backgrounds. Each snowflake pattern is mathematically generated from thousands of possibilities for a truly one-of-a-kind show.
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Pattern Panics! 

Play more than 250 fun and challenging levels. Pattern Panics! lets you recreate many different patterns from falling pieces. Rotating and moving these falling pieces form pattern. Recreation of these patterns offers unique challenge.
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PatternStringEngine 

Pattern String Engine is intended for lexical analysis of strings. Is based on technology "pattern matching". Allows to find all possible variants of comparison string with a pattern. Work with assignment inside pattern and much more.
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PatternHelper 

Makes it easy for developers AND beginners to design and test patterns. Patterns written with perl regular expressions, egrep regex, MS Word or Brief pattern matching languages can be designed and tested with syntax highlighting and a s
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