i wrote a 2-in-1 tumblr unfollow script. one will unfollow all your following on tumblr. the other will unfollow those who dont follow you (selective unfollow). It takes about 1 minute to unfollow 100. it's written in AutoHotKey. You do not need to open a browser to run the script. You do not even need to login tumblr. It runs in the background. It has been tested on Windows 7, Windows XP, Windows 2008. If you are interested, here is the download link: http://imagedefines.methinks.info/download/ Sorry it's under a content lock but i spent a lot more time than the time it takes to unlock a content locker. so i think it's fair