PhotoSearch - Search Photos for hashtags and users. Browse and explore public Images.
Inflact Instagram Search - Inflact Instagram Search is a web-based tool that enables you to search the IG profiles of users by their bio and name and use the provided filters for exact and instant results.
Yandex.Images - search for images on the internet, search by image
Aware Online Instagram Search Tool - Aware Online Instagram Search Tool allows you to search for a user and post on Instagram and analyze an account on Instagram.
lingvist.info - News & Books
Skimagram - Skimagram is an online Instagram search engine that allows you to find hashtags by entering their name or using video or photo for the task.