The ONLY tool that provides so much useful data to help you understand which hashtags to use, and WHY. Other tools are not data-driven.
Still waiting on Saul to whip up some RiteKit bundles, but it's a minor grievance, since RiteTag is so powerful by itself. :)
I've used several of the tools in the RiteKit suite, though RiteTag is the one that I just can't quit. I waffle between Buffer, Ritepush, eClincher and SmarterQueue, and I have other link shortener / CTA tools that offer what Rite.ly offers, but I haven't found another tool on the planet that offers as much useful data about hashtags as RiteTag, and honestly, I have no reason to look. :)