Roundcube - Web-based IMAP email client
Falcon.io - Falcon.io provides a platform for social marketing & customer experience management.
HEY - Email at its best, new from Basecamp.
TitanMLM - TitanMLM is a modern multi-level marketing management software that allows businesses to manage their operations from a single platform.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
Swift Social - All-in-One Social Media Growth and Management Tool