Zimbra
- Nice features (Free version and Paid version – basically support and active sync for mobile)
- Non-Windows
- AJAX web client is amazing
- Zimbra Desktop is very functional and has cool factor (CFO’s will love it because it is Free)
- Runs on Red Hat, Ubuntu, SUSE and (I am forgetting one be right back)
- more to come just trying out blog features of Linux.com
