Gramfeed is a social media management and search engine for Instagram. You can perform advanced searches for Instagram photos by hashtags, date/time, keywords, location and places. You can visualize photos on a map. Gramfeed allows you to login with multiple Instagram accounts to manage accounts. You can do all the basic things that Instagram app allows like explore popular Instagram photos, view your follower's photo feed, post comments, like photos, search users and manage followers.
Gramfeed is now Picodash, go to picodash.com for details and signup there.