Reblog at the speed of sound. NSTR is a revamped helpful reblog extension if you have many blogs and/or if you reblog like crazy.
Auto-select Queue and add tags with a press of two buttons, then automatically go back to the blog you were scrolling down, extremely customizable.
New Super Tumblr Reblog aims to pick up where every reblogger's arms fall when typing the same tags over and over again; just qualify the post, press a few key combinations, and select the auto-added "queue", boom, done.
For those who came from the original Super Tumblr Reblog: when I found out why that extension was originally removed from the chrome store, I saw it upon myself to revamp this extension because of it's useful code functionality. The reasons as to why it was originally removed are not relevant, as the original creator of that extension used it - in their own words - " For their optimized one-handed operation monster"