Free color chart software for linux

Libchart is a free chart creation PHP library, that is easy to use.
Main features:
- Bar charts (horizontal or vertical).
- Line charts.
- Pie charts.
- Compatibility with PHP 4 / PHP 5.
- No external dependency, need only PHP compiled with GD and FreeType

Color Label is a service menu for KDE based on Color Folder 0.3.4 by HessiJames.

HowTo:

Extract all files and

copy colorlabel into /usr/bin/...

perhaps you need to make it executable chmod 755 /usr/bin/colorlabel

copy colorlabel.desktop to /home/~/.kde/share/apps/konqueror/servicemenus/colorlabel.desktop

Open Flash Chart software creates Flash-based charts for Web pages.
How does it work?
1. User browses to your web site.
2. The browser downloads the web page which contains the Open Flash Chart.
3. Open Flash Chart downloads the data file and displays the chart.
When you add Open Flash Chart to your web page, you tell it where to find the data file.
Why is that great?
When the user downloads the web page, Open Flash Chart requests the chart data from the server. The server knows who the user is so it can generate a chart for that particular user showing up to the minute data.
Is it complicated to set up?
You will need to include the Open Flash Chart in your HTML, and you also need to provide the data file on the server. The data file is either a text file, or a .php (or another flavour of dynamic) page.
For a simple chart you would just drop the data.txt file on your website and point the Open Flash Chart to this URL.
But what we really want is dynamic data that is pulled from a database or calculated or something. To do this you need to create the data file when it is requested. To do this we point the Open Flash Chart to a .php page and this PHP page does your calculations and/or database lookups, then outputs the data file.
To make this a bit easier I have written a PHP class to write the data file for you.
Enhancements:
- The PHP was updated to enable 3D charts and glass charts.
- Some more options were added to the other graph types.

JOpenChart provides a Java library and toolkit for generating and embedding charts into applications.
JOpenChart is a free Java Toolkit and library for embedding charts into different kinds of applications, no matter if they are server side, desktop or web applications. Commercial solutions are pretty expensive and at the time I started working on JOpenChart, there was no satisfying open source solution available.
Currently, the library provides all the functionality to draw different kinds of charts, like line, bar, pie and plot charts. Additionally, the class structure includes the necessary classes for the encapsulation of sets of data and the classes for all parts of a typical chart, like a coordinate system, coordinate axes, legends, title and chart renderers.
I put great effort into a good design, ie understandable, logical class structures, elegant interfaces, use of abstract classes etc. The library is easily extendable to provide your own functionalities. This is best illustrated by noting, that all the Renderer classes, which paint the charts, have about 150 - 200 lines of code.
Furthermore, a few more or less proof-of-concept classes are finished that demonstrate how to embed charts into web applications or Swing applications using Servlets or a JComponent respectively.
Main features:
- rendering of pie charts, line charts, bar charts and plot charts
- easy extensibility using a simple Renderer interface API
- linear and logarithmic y-axis
- different data model classes for implementing numerical data sets, data sets with non-numerical x-axis values, dynamic data sets for displaying incoming measured data, SQL database query results.
- polynomial and spline interpolation of data sets and linear regression of measured data
- binding data sets to one of two y-axes with different scales
- plotting of mathematical functions given as String parameters
- exporting diagrams as image files at least using PNG or JPEG compression and whatever encoding the Java Advanced Imaging Library supports
- Servlet Toolkit for the easy inclusion of charts into web applications
- Swing components to integrate charts in Swing applications
Enhancements:
- Now renders stacked bar charts and radar charts.
- Fully automatic, and good looking, margin adaption. No more cut-off labels.
- Add data models with differently sized data sets.
- Support for editable data models, enabling real time updated GUI charts, see GraphFrame.java as an example and the TestGUI ant target.
- Now allows manually setting of maximum and minimum x- and y-values, allowing for zooming.
- JDBCPlotter.java allows plotting of SQL query results.
- Various options for controlling rendering style, esp. of bar charts and coordinate systems, see FunctionPlotApplet.java and always TestChart.java.
- e.g Setting the axis units
- and displaying sums on top of bars etc.
- Choose preset shapes and arbitrary colors for your data sets and plot charts, easily implement your own shapes
- RowColorModel is not a singleton instance anymore
- I externalized the ChartDataModelConstraints class, you can provide your own implementation or extend the existing ones. See StackedChartDataModelConstraints as an example.
- Web archive (war file) now supports Tomcat 3.x and 4.x.

color wrapper is a non-intrusive real-time ANSI color wrapper for common unix-based commands on GNU/linux. cw is designed to simulate the environment of the commands being executed, so that if a person types du, df, ping, etc. in their shell it will automatically color the output in real-time according to a definition file containing the color format desired.
color wrapper has support for wildcard match coloring, tokenized coloring, headers/footers, case scenario coloring, command line dependent definition coloring, and includes over 50 pre-made definition files.
cw works by having an augmented PATH environmental variable which has a path to the cw definition directory prepended to it, this is usually set as "export ATH=/usr/local/lib/cw:$PATH" (in bash). in this cw definition directory you will see file(s) under the very same name of the program they are designed to color. these files appear as the common executable binaries you may be used to using, but they are just text files that contain instructions for cw to use, including the path to the "real" binary.
Enhancements:
- Fixed bug that could crash cw, introduced in the previous version.

Color::Fade provides a Perl extension for fading text colors.

Color::Fade uses mathematical formulas to take an input string of virtually any length, and virtually any number of colors, and assign an individual color to each character to fade between each of the input colors.

In other words, it makes your sentences look really pretty.

Methods

Fade $string among the colors in @colors, where $string is a string of length greater than zero, and @colors is an array of colors in six byte hexadecimal format, with or without the leading octothorpe. @colors must have at least two elements.

When called in array context, the method returns an array in which each element is of the format:

y

For each character, where xxxxxx is a hexadecimal color code and y is one character from the original string.

When called in scalar context, this array is joined before being returned.