AeroLeads - AeroLeads is a lead generation software which finds prospects with email and phone number.
Capterra - Capterra helps millions of people find the best business software. With software reviews, ratings, infographics, and the most comprehensive list of the top business software products available, you're sure to find what you need at Capterra.
Hunter - Find all the email addresses related to a domain
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.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
SoftwareSuggest - SoftwareSuggest.com is a business software discovery and recommendation platform.