What are your favorite SEM tools?

Hello friends,

I want to know that What are your favorite SEM tools?

Google Analytics
Keyword Planner
SEMrush
Open site explorer
Small SEO tools
Buzzsumo

Bing Ads Campaign Planner
Google AdWords Auction Insights Report
Google AdWords Keyword Planner
Google AdWords Ad Preview and Diagnosis Tool
Google Analytics Benchmarking reports