Reminders.app does a great job when I want create lists and inventories! I use it for groceries and webpages too. For example, I've sent many of the Emacs-related links to my Emacs list in Reminders, where I know I'll be able to find them the next time I forget Gall's Law and look for a more-complex system to replace my current one: writing things down; thinking about what I've written; redrafting; and repeating.