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.
The guys at SmartReach.io have created a pretty cool plugin for LinkedIn and Gmail. Find contact details while browsing LinkedIn, or directly within gmail as you are composing a new message.
We think the Gmail email finding feature is pretty cool, and definitely unique. If you use Gmail a lot, and outreach to many people on a case-by-case basis, we'd recommend it!