Instagram Downloader is a Windows utility that will help you download pictures hosted on any Instagram account.
Collect all the photos in an Instagram account
Instagram Downloader includes a search engine that allows the user to enter the names of Instagram users from who you want to download photos. If the privacy options of the accounts in question allow it, then Instagram Downloader provides links to all of the photos that are hosted there. The utility also provides links for the "Photos of the Day" and the most popular pictures on Instagram.
Not quite as practical as you might think...
Despite a minimalist interface and results that appear quickly, Instagram Downloader ultimately proves to be very impractical for downloading photos: it doesn't actually allow you to download then, but instead to recover their links, at which point you then have to carry out lots of manual copy/pastes to recover the pictures. In addition, it doesn't let you preview the photos and lots of connection errors to certain accounts (despite being public accounts) have been reported. During our test, it was impossible to copy links related to certain accounts.
For use with a download manager
We would have liked Instagram Downloader to have integrated its own download manager, rather than providing us with a list of links, which just results in a shambles. Those of you who are patient, however, might still like to use it with software like jDownloader so you can actually download photos for which you have the links as a result of using Instagram Downloader.