AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
Ahrefs - Ahrefs is a toolset for SEO and marketing. We have tools for backlink research, organic traffic research, keyword research, content marketing & more. Give Ahrefs a try!
SimilarSites - Easily find more sites like those you like.
Google Search Console - Google Webmaster Tools provides you with detailed reports about your pages' visibility on...
Product Hunt - A website that lets users share and discover new products
Bing Webmaster Tools - Drive more visitors to your site using Bing data on search queries, crawling and search traffic.