Very basic RRDtool tutorial. It is an example in that way. It can save you a couple of days of discovering on your own. In any case you have to read the manual _before_ that ;)
Viewmol is a graphical front end for computational chemistry programs. It is able to graphically aid in the generation of molecular structures for computations and to visualize their results.
Viewstl is an open source way to view Stereo Lithography Files as shaded on-screen images. Ascii STL files and dynamic rotation, scaling, and panning are currently supported. Written in C using OpenGL, GLU and GLUT.
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GraPHPite is a highly customizable utility written in OO PHP for creating charts or graphs (Bar, Area, Pie, etc).
Users are encouraged to switch to PEAR::Image_Graph which is based on GraPHPite source. GraPHPite is in maintenance only state.
StateGL++ is an abstraction layer hiding OpenGL implementation details such as stack depths and attribute settings and allowing pushing and popping of lights and materials. With StateGL you don't have to worry about GL_MAX_*STACK_DEPTH.
NPGPX is a Qt-based Netscape plugin that displays GPX files (GPS eXchange) with waypoints, routes, and tracks embedded in a webpage, with optional background maps.
jpcap is a set of Java classes which provide an interface and system for network packet capture. A protocol library and tool for visualizing network traffic is included.
jpcap utilizes libpcap, a widely deployed system library for packet capture.
A user-friendly mathematical plotter. Its main purpose is displaying 2D/3D functions, defined in rectangular, polar and cylindrical coordinates, relations between variables, parametric curves/surfaces and vector fields. It is based on SDL and OpenGL
VtkExtension is a heterogenous library of C++ classes for use with VTK. Included are additional geometry sources, extended collection classes, extended XML parser and string facilities, as well as composite classes abstracting larger application needs.
Sonogram and waveform display programm for Unix using different algorithms like FFT and LPC to display musical features or potential artefacts that you may no be able to hear. Superimposed tuneable Staff-Lines allow for easy transcription of music.
JPlot is a multi-purpose data plotting program for use as the graphic front-end of (scientific) software. JPlot is also available as a stand-alone application with a complete and easy-to-use graphic user interface (GUI).
VRVis is a programmer's toolkit for rapid development of Virtual Reality applications in the field of geospatial data visualization. It is based on VR Juggler and the Geospatial Data Abstraction Library (GDAL).
Planimetric Geometry (JCabri) is a rewrite of Cabri Geometry in Java. It provides solution for doing geometric constructions in 2D and exporting them as an animated GIF or Java applet.
bitHull is a Simple unstructured data store-and-share mechanism. It is part experimental graph-based task/note/idea management system and part data aggregator.
The OpenSceneGraph (OSG) is a cross platform C++, OpenGL based library for real-time visualization, with uses such as vis-sim, scientific modelling and games.
Ledctl is a program written in C that uses the Parallel Port Interface(PPI) of the FreeBSD kernel to drive LEDs connected to the parallel port of a computer. It can be used within scripts to visually notify users for new mail, high processor load, etc.
VtkFLTK is a small library of C++ classes for development of FLTK event-driven interfaces for use with VTK. VtkFLTK attempts to transparently bridge disparities between FLTK and VTK event and windowing system handling.
"CSV Configurator" is a program which permits to edit a CSV data file and start scripts using this file as parameter via buttons/menu entries which can be customized.