I need to re-visit Evernote, though I don't want or don't need to use any web features. But that does remind me of the thumbnail view of notes it had (?) which is also a good possibility. Onenote I am one of the few I know that has never used. Might be time to try.
I looked at Notezilla and it says "Stay Neat: Organize sticky notes inside folders to avoid clutter on your Windows Desktop." Does that mean I can view stickies within the program window instead of on the desktop? It would be nicer not to use desktop but if I have to then sticky programs in general may be an option, if nothing else.
I used the word aggregation in this sense. If a program supports tasks, reminders, appointments, etc. I want everything to displayed in this view that I am imagining. I guess, probably wrongly, I associate stickies with short reminders when I am hoping to have maximum amount of details in front of me.
One that I have comes across is Pigeonhole (I have no affiliation to them at all) that is probably the most promising yet but I want to keep looking.