1. SERP Trends SEO Extension
This chrome extension provides you with an insight into the ups and downs of your website's SERP ranking on a regular basis.
2. Nightwatch’s SEO Search Simulator
SEO Search Simulator by Nightwatch allows users to see the top-ranking results depending on location.
Fatrank is an SEO Chrome extension that provides real-time rankings for any website or keyword. This can be quite useful in tracking competition or client site performance.
4. Google SERP Counter
It simply adds numbers to search results, allowing you to determine your website's SERP position.