The source is available in location http://www.jslint.com/lint.html
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JMeter is a pure Java desktop application designed to load test functional behavior and measure performance. It may be used to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). It can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types.
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The TclPro tool set includes a graphical debugger, a static code checker, a wrapper to generate stand-alone executables, a quot;compilerquot; that writes out Tcl byte codes, and a loader that reads byte codes.
PyChecker is a tool for finding bugs in python source code. It is similar to lint. PyChecker checks for each function, class and method for possible problems. It is capable to identify import errors.
Comment Mentor (COMTOR) is a tool for automatically assessing the quality of source code comments.