A Sharepoint 2010 Custom Field Type that extends the SPUrlField type to allow you to have an image instead of a text description as the link.
When creating a new column, the feature adds a new type called "Hyperlink with Picture"
The new column is exactly the same as a Hyperlink type column, but instead of displaying the link as the description text, it shows an image instead.
When editing a list item you enter the target url and the url to the image you want to display for the link
When you view the list item the image will display and open the target url link when clicked