Back in 2005, Joe Trifoglio, chief information officer of Zip Realty, needed a new e-mail system for his 2,500 real estate agents spread out across 14 major metropolitan areas. His homegrown, open-source e-mail client worked well, but he needed something that would work on top of his custom-built CRM system, known internally as ZAP, the Zip Agent Platform. Prior to shopping for a new messaging system, Trifoglio’s real estate agents toggled between their e-mail and CRM app, and they had to manually input a lot of information (such as appointments) between the two. There was a variety of Web-based e-mail clients for Trifoglio to choose from, including Google and its Google Apps. But because Zip Realty built its CRM system completely from scratch and on Java and open-source components, Trifoglio needed a messaging system built on similar principles. He picked the open-source, Yahoo-owned Zimbra, an e-mail, calendar, and chat (instant messaging) client. Trifoglio noted that other vendors offered the same features, such as e-mail and instant messaging, “but they had little ability to integrate with our internal systems [mainly ZAP].” After what he describes as moderate development work, Trifoglio says the e-mail system is now embedded on top of his customized CRM, allowing his real estate agents to book showings with better efficiency than ever before. For example, at the front end of Zip’s Web site, people can book appointments with realtors to look at residential properties. That information is fed from the front end of the Web site into Zip’s CRM system. Typically, agents had to do a lot of the data input between the CRM app and their calendar app. Now, with Zimbra on top of ZAP, it happens more easily. When agents come in, they now have a single sign-on that logs them onto both CRM and e-mail at once. With Zimbra, they can also add Zimlets—which are essentially plug-ins, such as one for easy calendaring—that get embedded on top of the application. “The agents are much happier because it’s more feature rich,” Trifoglio says. “The system allows end users to use Web 2.0 features, like tagging emails and searching mail.” He says Zimbra also works well on Windows mobile phones, which will be critical for the agents on the move. Currently, agents are testing the Zimbra app on their mobile, and they have given Trifoglio only positive feedback. Another upside to a Zimbra implementation? “As far as the cost of purchasing the software, it’s a fraction of what it would cost to do Exchange or Lotus Notes or something like that,” Trifoglio says