Web CEO is a powerfull Search Engine Optimization Tool which has all the features one could expect from a great SEO software. They’ve been successfully improving the software over the last few years and continue to do so. Specialy with more competition in their area they’ll make sure to stay on top of new developments. It’s not really an inexpensive software but for most people the free version will do just fine. 

It can be a loyal assistent when doing keyword research as well as many other tasks a webmaster spends his or her time on. They’ve recently added a feature to find link partners which is an enormous improvement and a powefull tool for you to find targeted partners world wide. Untill you find a better solution ,this is a “must have” to add to your arsenal..