This plugin adds a widget to display download statistics based on the <a href="https://wordpress.org/extend/plugins/wp-downloadcounter/" rel="ugc">Download Counter</a> 
plugin on your site. The sidebar widget will show a highly configurable chart based on the 
<a href="http://code.google.com/apis/chart/" rel="nofollow ugc">Google Chart API</a>. Furthermore it offers a dashboard widget that summarizes your 
downloads, to get information quick at a glance.
The plugin supports following chart types:
<ul>
<li>Bar (horizontal)</li>
<li>Pie </li>
<li>Pie 3D</li>
</ul>
You can include a chart of your downloads on a page or in a post using the downloadcounterchart-shortcode. 
Of course a download chart is includable in your theme. See <a href="https://wordpress.org/extend/plugins/wp-downloadcounter-chart/other_notes/" rel="ugc">extended documentation</a> 
for detailed explanations for that.
<h3>Usage</h3>
There are several ways to include a chart of your downloads on your site.
<h4>Page / Post (Shortcode)</h4>
<pre>[downloadcounterchart chart_type="pie" chart_width="490" chart_height="190" label_color="000000" label_size="11" sqlcondition="" bar_color="0066CC90" bar_height="-1" bg_color="FFFFFF00"]</pre>
Parameters:
<ul>
<li>chart_type – Type of the chart. Valid values: <code>bar_horizontal</code>, <code>pie</code> or <code>pie3d</code>.</li>
<li>chart_width – Width of the chart image in px. May be about the 2.5 times size of the height for a pie chart.</li>
<li>chart_height – Width of the chart image in px.</li>
<li>label_color – Hex color value for labels, optional with additional opacity value (e.g. 50% black = 00000050).</li>
<li>label_size – Font size of the labels.</li>
<li>sqlcondition – Optional SQL where statement, leave blank for all downloads.</li>
<li>bar_height – Bar chart only. You can explicitly set the bar height, but it may result in a chart that does not include 
all data, if the chart height is not big enough. Recommend to set <code>-1</code> for auto-sizing.</li>
<li>bg_color – Background color. Hex color value, optional with additional opacity value (e.g. transparent = FFFFFF00)</li>
</ul>
<h4>Theme</h4>
<pre>downloadcounterchart_img($chart_type, $chart_width, $chart_height, $label_color = '333333', $label_size = '11', $sqlcondition = '', $bar_color='', $bar_height='', $bg_color='')</pre>
Parameters:
see section above
Example:
<pre>if (function_exists('downloadcounterchart_img') && class_exists('DownloadCounterChartApi')){
 downloadcounterchart_img(DLC_CHART_PIE, 490, 190, '000000', '11', '', '0066CC', '-1', 'FFFFFF00');
}</pre>

Download Counter Chart

Visualization of your downloads based on the Download Counter plugin.

Ruben

D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG and CSS. D3’s emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization components and a data-driven approach to DOM manipulation.
Ths plugin provides the current last version of D3 (v3.3) and a javascript editor to add javascript code into your post or pages and render it. 
All extra .css or .js files can be uploaded to your WordPress blog and then included into the post/page easily using built-in functions. 
Enjoy!.

Wp-D3

A plugin to integrate D3 into your Wordpress post/pages.

Download Counter Chart vs Wp-D3