I have an old Handspring Visor (I don't think Handspring is even around anymore...they folded into the Palm/Treo line, I think). I use it as a phone book, calendar, shopping list maker, and for playing Solitaire on Metro. I have a keyboard attachment for it when I used to take notes with it at meetings, but I don't use it for that anymore.
It doesn't have email or phone capabilities and it's rather bulky by today's standards, but it serves me fine.