[rfelix2121]

An Inka Pen. The older, metal ones, not the new terrible ones that Nite-Ize makes: http://www.amazon.com/Nite-ize-Stylus-Carbon-Fiber-Stainless...

[scott_karana]

Failing an Inka pen, there's always the Space Pen, or for budget inclined, the Zebra F-301 (and Compact version of the same)