Better than the official Tumblr App in many ways – MultiTab for Tumblr Review
FastFeed offers many things that the Tumblr app proper should, like tag importing, allowing for multiple tabs for browsing blogs and tags, and setting up custom dashbpards for specific tumblr users or tags.
A few things do not work like scheduled posts, but most of the time the loss is not too important.
Review by osorei on
MultiTab for Tumblr.