New submitter Gonzalez_S writes "There are many digital pens out there, but none of them seem to work on Linux; unless you combine them with a tablet. I have contacted many vendors (Lifetrons, Dane-Elec, ApenUSA, IntelliPen..) and only Intellipen responded that there is very limited support for Linux. Do any of you know of a digital pen that works fine using Linux on normal paper? Some options to explore: can the pen work in real time on my PC screen? Can it function as a mouse? Can the pen work offline? Do I need a tablet (preferably not)? I would be happy if anyone shares a success story here, as they seem a great tool."