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.

jvrtanoski

Plugin that will allow the blog authors to add simple but effective geo-chart, bar-charts or line graphs in their blogs. 
The plug-in provides shortcodes for each chart type. The short codes can be placed anywhere in the text of the post/page 
and the plug-in will render the chart in the place of the short code. The data for the chart is placed in form of table 
insite the shortcode tag. For more details see the samples in the FAQ section. 
The charts are based on Google’s Javascript charts library, and the format of the data table is determined by the library itself. 
For more details see the help pages of the Google Chart library.

GoogleGraph

Plugin allows the blog authors to add simple but effective geo-chart, bar-charts or line graphs in their blogs using Google's Chart .js library.

Download Counter Chart vs GoogleGraph