Once there were dark times when Instagram did not have a desktop version but only mobile App. My friend and myself built Instafeed. It was quite popular with ~1,000 daily visits.
You could like posts, leave comments, follow people, switch between grid layout and column feed. You could even search by location, use Instafeed’s widget to embed your photostream to your website page! And it was great until Instagram asked us to take it down. Good times!
Main feed page
Your profile page