Solution Suggest is a team of marketing experts and researchers. They provide the best alternatives for software, games, apps, and websites that you already know or use and want to replace.
Product Hunt - A website that lets users share and discover new products
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
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.
BuiltWith - Find out the technology behind websites
SaaSHub - Find and promote software that will help you grow your business or to be more productive.
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.