I moved over to EagleFiler from the now defunct Journler.
Like junkmail, I have a library for keeping track of purchases and financial matters. I call it Web Receipts. I can store pdf receipts, confirmation and shipping-emails, bank statements, etc. all in Eagle Filer, and (if I tag consistently) find things quickly and easily.
I have another library called Meetings that I use for organizing files and notes for various meetings I attend.
I’ve not looked at Circus Ponies, so I can’t offer a comparison there.