It's a full fledged photo platform for S3/Dropbox/etc. In addition to displaying your photos nicely (and in a themeable manner) the platform provides exif extra

It's a full fledged photo platform for S3/Dropbox/etc. In addition to displaying your photos nicely (and in a themeable manner) the platform provides exif extraction for tags, title, geo location, etc. All of that information then becomes searchable via the API. There are plugins, webhooks, etc. At the risk of sounding arrogant it's pretty awesome what the community has built.