Casares's most recent company is Lemon; it makes an app that lets users keep track of their expenses by digitally
filing pictures of their receipts.
Not exact matches
Otherwise, you can just take
pictures of your
receipts and
file them in Evernote's database according to your project.
I find Evernote particularly useful for
filing receipts, which you can do by taking a
picture of them and then storing them in your «notebook» for whenever you next need them.