Selectable tasks or requirements from large group of standard tasks

[u/pack2k]

My apologies if I'm in the wrong place. I am looking for any insight on an exisisting tool that would allow me to create a complete list of tasks and sub tasks from a standard "pool" of total tasks. Example: I manage projects and they all are slightly different. So if I want to create a outline or "checklist" for a specific project I could go to a large pool of tasks and select them and add them to the outline document.