I am not a heavy user of SEO tools or toolbars, but Aaron Wall's latest tool, he named The SEO Toolbar has received a ton of feedback and buzz from the SEM industry. The day it was released, which was some time last week, about a dozen or so SEO blogs wrote about it. Most people praised this toolbar as the only tool SEOs need.
This toolbar is jam packed with features including link data, directory information, competitive data, rank checking, keyword research, RSS reader, comparison tool and much much more. To see all the features, go to The SEO Toolbar.
Forum discussion at Sphinn.