SendX.io - SendX (https://sendx.io) provides remarketing and retargeting tools for web businesses. You can use popups, landing pages, email, web push notification, automation workflows and FB / Google retargeting to drive more revenue.
TestSubject - Test how your email subject line displays on mobile devices.
Nova Inbox - Personalize emails in seconds, right from your inbox
analyze.email - Test the spam-y-ness of your emails
Mailblast - Email marketing on a budget using Amazon SES
Rename Email - Easily change the subject of any email, by cloudHQ