BBoostr.com is described as 'Helps you Keep your Tumblr Blog Ever-Active and Helps you Gain New Followers for Free. With BBoostr You can See Who Un-followed you on Tumblr, Que unlimited Reblogs, Bulk follow users via List of Usernames and a Lot More' and is an website in the Social & Communications category. There are three alternatives to BBoostr.com, not only websites but also apps for a variety of platforms, including Google Chrome, Linux, Mac, Windows and Firefox. The best alternative is New XKit, which is both free and Open Source. Other great sites and apps similar to BBoostr.com are Post To Tumblr (Free) and Tumblr Savior (Free, Open Source).
A fork (copy with changes) of the original XKit addon, which improves your Tumblr experience. It is comprised with the ability to install more extensions, further adding more features. Please note that the crew behind New XKit is not in contact with the original XKit Guy.