Now you can offer private-labeled email, IM and calendar tools to all of your users for free*, so they can share ideas and get things done more effectively. You can design and publish your organization's website, too. It's all hosted by Google, so there's no hardware or software for you to install or maintain.
You can choose any combination of these Google services
Gmail - Offer email to your members with 2 gigabytes of storage per account, search tools to help them find information fast, and instant messaging built right into the browser.
Google Talk - Your members can call or send instant messages to their contacts for free -- anytime, anywhere in the world.
Google Calendar - Members can organize their schedules and share events, meetings and entire calendars with others.
Google Page Creator - Create and publish web pages for your domain quickly and easily with this what-you-see-is-what-you-get website design tool.