Which of these forms is better: "list of tasks" or "tasks' list"? Another question is whether I should use apostrophe or not ("tasks's list" vs "tasks list"). 

Other phrases which are similar to this, but aren't quite what I'm looking for, are "list of projects" and "task's action" (one task this time).

Maybe the answer is obvious, but English is not my native language so I need to understand it.