I would strike the word "software" out of the title. To get anything done requires the people with right expertise, clear goals, and roles mapping between them

I would strike the word "software" out of the title. To get anything done requires the people with right expertise, clear goals, and roles mapping between them. At some scale communication and coordination becomes a problem, at which point [good] project management is useful. However one must always keep in mind that project management (and the accompanying tools) are not the work. All too often project management becomes the hammer to attempt to paper over gaps in expertise, goals, or role definition. At it's best, project management provides a lightweight layer that makes the overall status and details of a project clearly visible and discoverable by anyone at any time without requiring a meeting or interruption. At it's worst, the structure of what is captured is entirely divorced from both the ground level work and greater business objectives, and is either ignored by the team, or is used as shield to prove they are working hard even if nothing is getting done.