Providing temporary use of on-line non-downloadable software for project management, workflow management, task management, schedule management, document and file management, contact management, and workflow tracking; providing temporary use of on-line non-downloadable software for group collaboration, data synchronization, file sharing and screen sharing; providing on-line non-downloadable software for enabling and facilitating real-time and asynchronous interpersonal communications and collaboration between users; providing on-line non-downloadable software for managing the content in and users of virtual team workspaces and shared virtual group spaces; providing on-line non-downloadable software for storing, browsing, sharing, uploading, downloading and synchronizing documents and files; providing on-line non-downloadable software for transferring data streams and files among users, computer desktops and computer servers via local and global communication networks; all for business and personal use