Simple easy to use project management software

[Dennis S. Gelbart]

Any suggestions on simple easy to use project management software that will NOT take 3 days to set up?  To start,  it should be free so I can test. I am more than willing to pay for it after I see if is adding value. There would be 1-3 people on the system at most. Many times only one

Thanks for your experience and input.

Dennis