Mangools’s SERP Simulator helps you see how your website’s pages look in the google search result. It allows you to create a reliable preview by adding dates, ratings, ads, and maps.
Browseo is a simple tool that allows viewing any webpage without distractions caused by styles so you can see the page similar to what search engines see when they visit your site.
Google Structured Data Markup
Google Structured Data Markup is a tool that helps you with structured data (schema markup) correctly for organizing and optimizing your website.