Canned Emails - A minimal site with prewritten emails
Rename Email - Easily change the subject of any email, by cloudHQ
TestSubject - Test how your email subject line displays on mobile devices.
DeepMail - Diligently sourced emails. Accurate emails for Startups and established companies
Hunter - Find all the email addresses related to a domain
analyze.email - Test the spam-y-ness of your emails