Microsoft Outlook is a web-based suite of webmail, contacts, tasks, and calendaring services.
Prompt owners before client deadlines and flag unreachable assignees.
Your assignees get due date reminder emails, and you see which tasks need your help reaching an owner.
Receive a digest of client deliverables with no owner update.
Owners get due date reminder emails, and your project lead sees who has not posted an update by the milestone cutoff.