MailsHunt is a relatively small, new tool that helps you to find anyone's email address and connect with the people that matter for your business.
It's generally nice to support new, smaller tools and we like how their Domain Search lists all the email addresses of people who are working in a particular company.
EmailSearch.io is a simple tool that allows users to search for email addresses based on domain, LinkedIn profile, or company.
They have have a CSV upload and API solution for bulk email searches. Upload your document and have it enriched with contact data in no time!