A tool that is specific to finding profitable keywords
SEMRush is a tool that is specific to finding profitable keywords. We're living in a time now when SEO, is at the forefront of a successful blog. SEMRush is a program many new and older bloggers are using to optimize their sites, create the content their audience wants and create a better experience for their visitors.
Largest link intelligence database in the world
Majestic SEO is the largest link intelligence database in the world (next to the big search engines of course... but they won’t let us look at that). Even with a free account you can get a very good picture of what your competition’s backlink profiles look like and where they are getting a lot of their links from.
Robust and handy keyword research tool to get perfect keyword ideas
You will see KWFinder appear a few times on this list because it has so many cool features that it really fits into a few different categories, but as far as keyword research (the foundation of market research online) goes it is my absolute favorite. The team that develops this software is continually improving and tweaking it and to date, nothing comes close both in features and price. Heck, the training they provide with the software is worth the price of the software itself.
Plus when you click the link above they will let you test drive a fully functioning version for free.