There are quite a few image gallery modules for Orchard but they were not invented here I wanted something a lot less sophisticated that would be as barebones and minimalist as possible out of the box, to make customization extremely easy. So I made this, in less than two days (during which I got distracted a lot).

Nwazet.ZenGallery uses existing Orchard features as much as it can:

• Galleries are just a content part that can be added to any type
• The set of photos in a gallery is simply defined by a folder in Media
• Managing the images in a gallery is done using the standard media management from Orchard
• Ordering of photos is simply alphabetical order of the filenames (use 1_, 2_, etc. prefixes if you have to)
• The path to the gallery folder is mapped from the content item using a token-based pattern
• The pattern can be set per content type
• You can edit the generated gallery path for each item
• The default template is just a list of links over images, that get open in a new tab
• No lightbox script comes with the module, just customize the template to use your favorite script.
• Light, light, light.

Rather than explaining in more details this very simple module, here is a video that shows how I used the module to add photo galleries to a product catalog:

You can find the module on the Orchard Gallery:
https://gallery.orchardproject.net/List/Modules/Orchard.Module.Nwazet.ZenGallery/

The source code is available from BitBucket:
https://bitbucket.org/bleroy/nwazet.zengallery