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GPHotos
You upload your images in GPhotos system, you give a link and a title to it, and then you insert the shortcode [GPhotos] in your article. Voila!
You can contact the author at: <a href="mailto:gregoire.felix@gmail.com" rel="nofollow ugc">gregoire.felix@gmail.com</a>.

GPhotos

GPhoto is a simple image gallery, easily manageable.

shanarelle

A WordPress widget that accepts a set of image preferences and a 500px api key. Will show up as a title and a button in your sidebar. When someone clicks the button it will search 500px for an image matching your preferences and display a result in a lightbox style popup. Each click will likely have a different result, so it should help give you some ideas.

GPhotos vs Nature Inspiration