Paper and Pencil Games
Paper and pencil games are, naturally, those that can be played with just paper and a pencil. Here are links to many of the best paper and pencil games.
boardgames.about.com/od/paperpencil/

Paper and Pencil Games.
Not strictly a pencil and paper game - but you could play it with paper tokens. Here are some links to other people's paper and pencil games: ...
www.sjbaker.org/paper_and_pencil_games/

Pencil and Paper Games
Fun, simple games to kill time at a restaurant, at the doctor's office, in the car.
www.todaysparent.com/craftsactivities/indoors/article.jsp?content=1151187&page=1

Pencil and Paper Games
Instructions for Sprouts, Pipelayer and Capture with animated step-by-step guide.
www.math.iastate.edu/danwell/MathNight/ppg.html

The Games Compendium - Pencil and Paper Games
Games that you can play in groups with pen and paper. Ideal for use by youth groups such as scouts, guides and boys brigade.
www.edinburgh-scout.org.uk/games/gc6.html

Mathematical Games
A collection of pencil and paper games with mathematical content. Many can be played through the site.
www.madras.fife.sch.uk/maths/games/