SciGraphica - Linux 下的科学图像处理

SciGraphica没有Windows版本，所以这可能影响了它的普及。我也没有用过，不过似乎和Origin一样强大。

http://scigraphica.sourceforge.net/index.html
windows下的同类型免费软件可以参考Gnuplot,或者Scilab 这样附带绘图功能的科学计算程序

SciGraphica is a scientific application for data analysis and technical graphics. It pretends to be a clone of the popular commercial (and expensive) application "Microcal Origin". It fully supplies plotting features for 2D, 3D and polar charts. The aim is to obtain a fully-featured, cross-plattform, user-friendly, self-growing scientific application. It is free and open-source, released under the GPL license.

Main features:

• You can plot functions and manipulate data in worksheets.
• You can open several worksheets and plots and work with them interactively and at the same time.
  
• The plots are fully configurable using a control panel dialog.
  
• The look and feel is completely WYSIWYG.
  
• Production/Publication quality PostScript output.
  
• You can interact with the plots double-clicking, dragging and moving objects with the mouse.
  
• Native XML file format.
  
• You can insert Python expressions in the worksheets.
  
• Terminal with command-line Python interface for interacting with plots and worksheets
  

It is completely programmed in C from scratch, using the GTK+ and GtkExtra libraries, and released under the GPL agreement.