Design
Icon Site
Below seems to be another decent place to find good icons
Midnight Theme

Ok a version of that I am comfortable releasing is available. Midnight is one of several themes that I will be modifying for Croogo in hopes that it will pick up steam and energize the community around this wonderful piece of software.
Midmight Theme (available here)
Icon Site
Icon Finder is a great place to find vector graphic icons on the web. They have a wide range of icons and easily searchable
Croogo Themes Part 1
So croogo is a wonderful piece of software that I would like to start using more and more. I have finally decided to adopt it as my main CMS for my website and will now start to failthfully post at least one post a week on here. Starting off of course will be theme modification. There have been several postings but I have yet to see anything that is a step by step conversion for changing this wonderful CMS so I will make my attempt.
First of all I am a developer and not a designer however in my line of work one can not be completly unfamiliar with design so I will be modifying templates from http://www.freecsstemplates.org specifically Moonlight http://www.freecsstemplates.org/preview/moonlight/ and we will be modeling the minimal layout from Fahad Ibnay Heylaa.
So once you have croogo installed and running you can manually install themes in the app->views->themed folder and once your directory is there when you login to the admin section you will see your theme option available. For this we are changing this theme we got from freecsstemplates.org to an html5 version of the theme that works with croogo.
So if you are starting from scratch once you create your theme directory you can create two folders inside of there. A layouts folder which will contian the layout for your theme, and the other folder youwill create is the webroot.
The webroot will have your theme.yml which keeps your theme information when imported into croogo. the menus and regions and vocabularies you will be using. Webroot also has the css and img folder. Basically this is the same as the cakephp webroot.
$this->only for cake controllers