This extension provides you the facility to display Manufacturer List just like you show Categories.

Demo:http://opencartshops.com/autoparts/

How to install it:

1. Upload the files in the chosen folder to your root directory. (This won't overwrite any core files!)
2. Go to the admin panel of your site: Admin > Extensions > Modules and install Manufacturer.
3. Edit it and enable it.
4. Go to the admin panel of your site: Admin > Design > Layouts and add it to specific layout
5. Apply the Manufacturer List a good CSS(optional) and thats it you are done.