Since Google external keywords tools are now gone and all online marketer are experiencing difficulty in the unreliable statistics provided by Goole planner, search engine specialists are no looking for best alternative for Google adwords tools.
I myself is a victim of this Google update. I find the planners not giving the exact keywords that i need. It always providing un related keywords that i do not need. If i choose the specific country, Google do not provide quantities except 10. So like you i am scouting alternative for Google keywords research tool.
Then here are the available now. Some are free keyword tools and some are paid research tols
Free keyword tools
Wordtracker – https://freekeywords.wordtracker.com
Ubersuggest โ http://ubersuggest.org/
SEO Book โ http://tools.seobook.com/keyword-tools/seobook/
WordPot โ http://www.wordpot.com
My favorite paid options
MOZ โ http://moz.com/tools/keyword-difficulty
Raven Tools โ http://raventools.com/tools/research-central/
KeywordSpy โ http://www.keywordspy.com/
SEMRush โ http://www.semrush.com/
There are no review on how are they effective ย but these free are worth to try.
Let me know if you have feedback.