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.
Product Hunt Reviews Widget - Embed and encourage PH reviews into your product
Keyword Surfer - Get search volumes & keyword data directly in Google.
Reviews for iOS - Keep track of your App Store reviews
Keyword Explorer by Moz - Find the best keywords to improve your website's SEO traffic
Typical Contents - Wirecutter for clothes