Roundcube - Web-based IMAP email client
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
Mailpile - Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Nextiva - Business VoIP, cloud phone systems trusted by more than 150,000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP service provider.