(no subject)

Okay, I know about rememberthemilk.com and dotproject and a few other ideas for project management and task calendaring -- are there other ways you people who work in small, project-based businesses manage your time and effort?

More background: I work for a small business that is typically at work on several (up to dozens) of projects at once. There are only a few employees. The boss wants some software (yes, they may write it themselves, but not just now) that will:

• track project timelines in a non-clunky way with minimal data entry
  
• use email as a reminder tool for, say, customer followup and the like
  
• be shareable
  
• ideally, be open source

Any ideas?