Arkham Noir is a fun solo card game set in the Lovecraft Universe. You can find a print and play for Case 2: The King In Yellow at the link (no need to have played Case 1 — they are standalone games).
Board Games
By The Rule Card Game
By the Rule is a free print and play card game with just 18 cards. The author describes it as “A quick little game of playing by the rules … but only for liars and cheats!”
Pocket Civilization
Pocket Civilization is a free, downloadable solo civilization building game that’s advertised as being compact enough to play on an airplane.
It looks very cool, and the Board Game Geek reviews are favorable.
Pandemic Hot Zone North American Print and Play
Pandemic the board game is a modern classic that has spawned many expansions and new editions. Publisher Z-man games is offering the Hot Zone North America version as a print and play game.
Satsuma Rebellion Game
The Satsuma Rebellion of Japan of 1877 was the inspiration for the Tom Cruise movie The Last Samurai. Warpspawn has a two player card game set in the period. Like all Warpspawn games, you need to create your own cards and pieces to play. Satsuma Rebellion game.