valgrind took the world by storm, making it really easy to find memory errors and profile your program's performance. Solaris's DTrace is the killer advance of the last few years. Similarly, Firebug has become a must-have tool for web developers.
he GFP is developed on Java, this way it can be used virtually on any operational system that handle Java Virtual Machine, so you can download a JRE on http://java.com specific for you OS. Mac users should check the Macintosh web site for details.
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