I first ran to SEO Spyglass and downloaded their latest version after reading their press release here claiming that though Yahoo Site Explorer is shut down that they won't be affected but honestly, that was a big lie.
I mean I had big hopes for these guys but they literally disappointed me, the results they were showing me was utterly weird and I just knew they were wrong so I decided to some sample tests...
I loaded one of my websites with over 1,500 backlinks and it returned only 34 backlinks then I decided to try on my other site with around 200 backlinks but SEO Spyglass returned only 40 backlinks, the whole thing was a big mess up.
It was a big mess and if I took such result to a competition, I was guaranteed to fail as SEO Spyglass now depend on the Blekko API and if you know what you are doing, you already know that Blekko is everything but good for researching backlink profiles */it's a waste of time/*
So, I continued my search to find a good tool and I've tested out so many tools out there, in the last 5 days, I've spent over $300 paying premium monthly charges to find any tool that will give me good results (good thing, I'm about to cancel all of them).
At first, OpenSiteExplore.org costing $99 a month was looking good but when I start using it deep, there were a lot of shortcomings on the features, it couldn't just meet up the required results.
I checked on many others, trust me... I already checked that one you want to recommend right now.
Till now, I read this post "The First REAL Free Alternative to Yahoo Site Explorer" and I got introduced SEO Attack | Free, Easy and Simple Backlink Analysis and so far, it's the best stuff that I've seen and from my personal opinion, it's far better than Yahoo Site Explorer combined with any other site explorer.
I'm nothing short of amazed by the features and their very friendly user interface, I highly recommend you check them out if you are looking for something better than Yahoo Site Explorer or any other site explorer tools you may be using now.
I hope you like it...