jHepWork (jWork) is an environment for scientific computation, data analysis, and data visualization for scientists, engineers, and students. The program is fully multi-platform (written in Java). Programs can be written in the Java, Jython/Python, and BeanShell scripting languages. Matlab/Octave is supported for symbolic calculations. The program can be used to display data and functions in D and 3D. It comes with a friendly IDE and a code assist.
Spaghetti Parenthesis Visualizer is an in-browser (meaning that it doesn't send your code to a server) tool that takes deeply nested conditionals in languages that follow in C's footsteps, including Python, Perl, PHP, and Java, SQL queries, or some Lisp code, and provides two visual presentations that clearly and cleanly display how deep each part of the code is in the layers of nesting.
freeDatamap is a business intelligence tool that transforms raw data into meaningful information by providing a unique way to browse any kind of data. It is a Web application that provides the possibility to navigate into structured and unstructured data. With its unique algorithm, freeDatamap is able to create a tree structure from flat data. It takes a CSV file as input and produces a tree with raw or computed attributes for each node.