Here is a really simple Gallery View for Service Catalog built as an example for a fellow SN Developer. It uses Jelly mostly and incorporates some jQuery for displaying details.
I have kept it very simple on purpose so it may be extended and changed to fit any needs.
Here is the Gist on GitHub. Feel free to modify it however you need. To install it just create a UI Page and drop the contents in.
Layout and Styling has been adapted from
Background is from