Keywords Everywhere - Keyword Tool
...is a free keyword research tool that shows you useful google keyword search volume and cost per click data on multiple websites. This tool saves you the hassle of copying data from various websites and using the google adwords keyword planner to see relevant search volume and cpc data.
Neil Patel has a handy keyword tool on his website: Ubersuggest
Get Your Organic Keywords Displayed in Google Analytics
The free plan checks your 25 most frequented URLs.