LinkedIn Recruiter - LinkedIn Recruiter is a recruiting tool to hire talent from LinkedIn.
Email Verifier - Email verifier app lets you verify email.
Lever - A modern web app for hiring. Lever is a simple, powerful way to manage lists of candidates during the hiring process.
Bulk Email Verifier - Clean up your large mailing lists before you use them. Clean list increases your reputation in MailChimp, AWeber, or Campayn.
Greenhouse - Greenhouse Software makes companies great at hiring.
Email Verification on Google Sheets - An add-on for email verification directly in Google Sheets