Email Studio for Gmail - Send personalized emails, schedule emails directly in Gmail

Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.

EmailDrips - Get inspired by examples of email sequences

Tendenci - Tendenci - The Open Source AMS is a cloud-based​ all-in-one management SaaS solution for Non-profits and Associations.

Clearbit Salesforce - Rapportive for Salesforce, augment lead data

YourMembership - YourMembership provides membership management software integrated with social networking features.