Soovle - Soovle is a customizable search engine provides the search suggestion of the best provider on the net.
KeywordTool.io - KeywordTool.io is the best FREE alternative to Google Keyword Planner and Ubersuggest. It uses Google's autocomplete feature to get over 750+ long-tail keywords for any given query.
Keyworddit - Keyworddit is a popular platform that can help you to raise your SEO game in a smooth and convenient way.
Google Trends - Explore Google trending search topics with Google Trends.
Keyword Surfer - Get search volumes & keyword data directly in Google.
Moz Analytics - Moz Analytics is the most popular SEO (Search Engine Optimization) tool that uses both basic and advanced research tools to enhance your traffic.