OpenGoo, Open Source ExtJs-Based Web Office
OpenGoo is an Open Source initiative to create a complete web Office which focus on improving productivity, collaboration, communication and management of your teams. OpenGoo support text documents, presentations, task list, emails, calendars, web links and contacts; Spreadsheets support is coming soon in future releases. OpenGoo interface is based on ExtJS, but I don’t find it much user friendly compared to Google Documents, or Zoho, but it’s already a great start for an open source project ! OpenGoo requires PHP 5.2+, MySQL 4.1+ with InnoDB support, and Apache 2.0+. The project rely on many other open source libraries in addition to ExtJS – including ActiveCollab , Reece Calendar , Swift Mailer , Open Flash Chart , Slimey , FCKEditor , JSSoundKit , and PEAR . Released under the Affero GPL 3 license. You can try their online demo , but if you downloaded the package don’t try to find an application launcher, Please ! Via Matt Asay, CNET, Alfresco .

Continued here:
OpenGoo, Open Source ExtJs-Based Web Office