[dba-Tech] Project Management Tools

Hi all

Does anyone know of a good, cheap alternative to MS Project?

I need a package that does

*	adaptive planning (critical path)
*	gantt charts
*	resource management where individuals can update their own tasks
*	emails triggered at key points e.g. when a task is assigned to you,
& emails to any resource manually

Ideally I would also like basic document management i.e. the ability to
attach documents to tasks.

I have a budget of $500 and five core users. If I could get a 10 or even 20
user licence for that budget then that would be sparkly.

TIA

Roz