They are actually a spin-off from the Simile Project & improved over time by a community of open-source developers.

Currently, it includes 4 widgets:

Timeline

Timeline is for creating an interactive display of events within a timeframe.

It can be dragged or controlled with the mouse wheel & events can be clicked to see the details.

Timeplot

Timeplot is a DHTML widget for plotting time series easily.

On mouse-overs, it can display the values interactively (it works with the same data format that Timeline supports).

Runway

Runway is a Flash-based implementation of the popular iTunes-like coverflow.

The colors, fonts, reflection & transit,in values can be configured easily. Also, it can fire events to update the web page's Javascript.

Exhibit

It is for creating web pages with advanced text search and filtering functionalities, with interactive maps, timelines, & other visualizations.

You can find more details on a previously published WRD post on Exhibit.

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• jqBarGraph (for jQuery)
• mooBarGraph (for MooTools)

Both plugins can create simple or stacked bar charts & data to be displayed is loaded with an array.

jqBarGraph has support for animated loading of the charts however mooBarGraph offers more features like:

• url bars
• info boxes (interactive charts)
• negative values
• AJAX data loading

They are both very easy to use & support all major browsers.

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It is possible to create multiple types of charts like line, area, bar & stacked charts, sparklines and more.

Each chart type has numerous API options to customize it’s look & behavior.

Charts created with Grafico can, optionally, be interactive which means they can provide data when hovered, clicked, etc.

The library is well-documented & supported with examples.

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It it configured mostly by dynamic functions which simplifies the usage by allowing for a really compact API.

A standard chart comes with no style but it can be totally customized with CSS (download package includes an example).

Important Info: The charts created work in major browsers. Although the example in the plugin's website doesn't seem to work in IE, the raphael.js file used can be replaced by the latest version of Raphaël JS library which will fix the problem.

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It can show values on mouseover that makes discovering the values easier & zooms any selected area.

The data can be called from a CSV file or mentioned in the code staticly (in CSV format).

The library can handle fractions intelligently & supports error bands around data series.

It works in all major browsers (IE requires excanvas) & it is compatible with the Google Visualization API.

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The library offers a high-level of usability with features like:

• tooltip labels displaying info on hovered items
• zooming on a specific part of the chart
• text rotation on labels for a better readability

Highcharts has an admirable effort in browser compatibility. For standard browsers it uses the canvas element and in some cases SVG for the graphics rendering. In Internet Explorer, graphics are drawn using VML. Besides all major browsers, it works in iPhone & IE6.

The library is offered for free to be used in personal/non-commercial projects & requires a license for commercial ones.

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It is capable of generating both static & interactive outputs including pie, bar, line or dot charts.

The charts are created with VML & supports the most popular browsers like Firefox 3.0+, Safari 3.0+, Opera 9.5+ and Internet Explorer 6.0.

There are some beautiful demos provided including the interactive pie chart & the dot chart.

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It uses the <canvas> tag and supports the following chart types:

• Column
• Bar
• Line
• Scatter
• Pie

 The library has a bunch of options to customize variables like:

• widths, heights
• font, font size, font color
• chart line colors & weights
• showing row names (on/off)
• & more..

MilkChart does not come with a demo page that you can play with but it is well-documented & a detailed info to start with can be found here.

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Juice Analytics is sharing 15+ free Excel & Powerpoint charts that can beautify any report.

There are simple-to-advanced examples of various chart  types like bar, line or pie charts which comes with sample data that makes customizing faster by editing the values used.

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The usage of tables is very important the data is already formatted in a way that is accessible to users browsing the web with a screen reader or other assistive technology.

The plugin offers a very easy usage as calling a function like: $('table').visualize(); is enough for creating a line, pie, bar or an area chart from a table.

Visualize offers various methods for customizing:

• the type (line, pie, bar or area)
• width & height
• title
• color
• margins
• & more

Here is a customizable demo to test the plugin completely.

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