ScalIT web applications are designed to work with most popular standards and protocols. This means that it should work equally well with OpenOffice.org as it does with Microsoft Office, with a Mac as well as with Windows, etc. Here are some popular and robust open source applications that are available for free download and usage:
Email and Calendaring
Office Suite (Word Processing, Spreadsheet, etc.)
Instant Message Software
ScalIT web applications also work well on there own, as web applications, and with popular commercial applications, such as Microsoft Office, Apple Mail, iCal, and iChat, and many others.