Bullet Proof Connection 

Bullet Proof Connection is an intelligent internet surfing simulator that prevents you from being disconnected from your Internet Service Provider(ISP). The simulator tricks the ISP into believing that the internet activities are active.
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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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Aldo's Pianito 

Pianito is a very intuitive and funny piano simulator with real time wave and midi recording, great to learn music. Recommended for children and adults. The included 128 instruments and 48 percussion instruments will provide you hours of fun.
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Whizlabs J2EE Certification (Test 484) Exam Simulator 

Ensure your success in IBM Enterprise Connectivity (with J2EE) test 484 certification exam with Whizlabs exam simulator comprising of 5 Mock Exams and Quiz (total 435 challenging questions) on the latest pattern.
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L-Nix 

L-nix is an interactive UNIX tutorial program that teaches beginner to advanced concepts of the UNIX operating system. L-nix includes a simple UNIX shell simulator allowing users to try out commands as they are learned.
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Gravit 

Gravit is a gravity simulator which runs under Linux, Windows and Mac OS X. It uses Newtonian physics. Although the main goal of Gravit is to be as accurate as possible, it also creates beautiful looking gravity patterns.
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