I use are Google analytic, keyword search, Alexa, open site explorer, Google Webmaster.

Hello Friends,

If Google Analytics is the air that an online marketer breathes, then GWT is the food that the online marketer eats.

These are some best SEO tools:
•   Google's keyword Planner
•   Google's webmaster tool
•   Google Analytics
•   Google adword
•   Screaming Frog
•   SEMRush
•   Google Trends
•   Moz

SEO tools help to optimize your website better and rank them higher in search results. The most used tools are:

Google keyword planner
Google analytics tool
Google webmaster tool
Google Adwords
Ahrefs
Copyscape
Moz SEO tools

Google's keyword Planner
Google's webmaster tool
Google Analytics
Google adword