I think the true measure of the popularity of a mobile app is when someone releases a desktop version. Instagram is now one of the handful of apps which can make that claim.
May I present Instagrille.
This app seems to have been out for a while now, but I just heard about it today. It’s an HTML5 based app which is designed to run on the Pokki app framework. It’s free, and it lets heck your feed, see your notifications, and make comments. You even have the option of downloading photos to your computer.
Now, I’m not one to do a lot of photography, but I can say that this is a sweet app. It’s remarkably lightweight, and when minimized it runs in my taskbar without using any appreciable resources. It’s definitely worth getting.
If you don’t have a PC, you can find a similar app for OSX called Carousel. It costs $2 in iTunes.