Overview
drawr (ドロワー) is a flash-based website where anyone with a pixiv account can sign in (using the same login details) and draw inside their browser, through a web application.
Since drawr does not have an interface for text, people usually reply to each other using drawings or drawn text. This means that people can create threads, where anyone can participate with drawn replies.
drawr does not have a search nor tag function, but the website is open for browsing by anyone even if they don't have a pixiv account.