I've always loved drawing with nasty, cheap ballpoint pens. They build up ink in a very particular way, while still requiring commitment to the line. So my go-to digital brush for layouts and sketching is modeled directly after the Bic Round Stic.
So I'm giving it out for free. Make some cool stuff with it.
*Gumroad changed their file limit for free stuff, so I have stopped including the .tpl version of the pen. If you need support for an older version of Photoshop, download this most recent version and email me.
Enjoy!