There is also a Lite version !
You can have one icon in front of your post title thanks to the get_cat_icon() function (click on the image to view live example of these screenshots taken from The World of Office Tips, Tricks and Tutorials and ) :
Or with 2 icons :

You can see that there are 2 icons here ; it’s because the post belongs to 2 categories
You can even use CSS to customize the display of your icons with the ‘class’ parameter of get_cat_icon().
In the sidebar, you can display icons on the left or on the right of the category names, or you can display only icons, thanks to the put_cat_icons() function or the widget (that you must activate) :
Here is another sidebar :
Here is an example of Category Icons in a RSS feed (in Firefox) :
Screenshot of the Widget :
Use the widget to display category icons in the sidebar
Screenshot of the Template Tags Panel :
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