What are some alternatives?
Libris - Libris is an asset management for photos and videos.
Roundcube - Web-based IMAP email client
Widen Collective - Widen Media Collective creates a seamless workflow for the creation, management and distribution of digital media assets throughout digital.
Zimbra Collaboration Suite - Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.
Bynder - Bynder provides the top reviewed digital asset management solution for world's top brands.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!