statistics and graphing

• R
  R is a language and environment for statistical computing and graphics. ...
  
• xd3d
  xd3d is a simple scientific visualization tool. It can plot 2D and 3D meshes, with shadowing, contour plots, vector fields, iso-contour (3D), as well as 3D surfaces z=f(x,y) defined by an algebraic e...
  
• gretl
  This is excelent statistical analysys tool. By excelent I mean: profesors and doctors in econometric use it to do science. ...
  
• g3data
  g3data is a program for extracting data from graphs (i.e., scanned graphs from scientific publications). It can read many different image formats and outputs the extracted data through stdout or to a...
  
• ploticus
  PLOTICUS is a command line utility for creating bar, line, pie, boxplot and other types of charts and plots. ...
  
• JAgents
  JAgents is a tool for simulating dynamics of selfish users in traffic networks like the Internet. ...
  
• gnuplot
  gnuplot plots 2d and 3d graphs, from a data file or with a formula. It has an interactive mode with online help, or it can be used non-interactively. gnuplot does function fitting to data sets, and i...
  
• R project
  R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T...
  
• IrcMap C2
  IRcMap C2 is a Java applet to show tree structures such as networks and data structures. ...
  
• Quickplot
  Quickplot is a fast, interactive 2D plotter with infinite zooming, value picking, pipe input, and unlimited plots displayed. It is meant for looking at your data quickly and (less importantly) making...
  
• Kst
  A really cool plotting and data viewing program. ...
  
• CoaSim
  CoaSim is a tool for simulating the coalescent process with recombination and gene conversion under the assumption of exponential population growth. ...
  
• tablix
  Tablix is a high school timetable generator. It uses a coarse-grained parallel genetic algorithm to construct sensible timetables from XML-formated school information files. ...
  
• OpenGrade
  OpenGrade is software for teachers to keep track of grades. It can put the students' grade reports on a Web server and allow the students password-protected access to them. ...
  
• pychart
  PyChart is a Python library for creating high-quality Postscript, PDF, or PNG scientific charts ready for publishing. It supports line charts, bar charts, range-fill charts, and pie charts. ...
  
• MayaVi
  MayaVi is a free, cross platform, easy-to-use scientific data visualizer. It provides a powerful GUI to ease the visualization process. It is written in Python and uses the Visualization Toolkit (VTK...
  

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