Email Studio for Gmail - Send personalized emails, schedule emails directly in Gmail
TouchStream - Drip campaigns for Gmail
EmailDrips - Get inspired by examples of email sequences
Signature.email - A powerful visual drag and drop email signature generator paired with the easiest way to maintain consistency for your whole team.
Clearbit Salesforce - Rapportive for Salesforce, augment lead data
Elite Email - Drag & drop email builder for awesome newsletters