One Deck Mini
How it works: This is a smaller version of another deck (the original One Deck), which recently launched on Kickstarter (we were a backer), and now is available in public release. It's a jack of all trades that you can use to play just about any table game you can think of.
Why it's clever: The single deck can be used to play regular card games, chess, checkers, dominos, dice, poker, or as scoring chips for other games you are playing. Admittedly, it gets a bit hectic squeezing all that into one deck, but for travel or pocketability, you really can't beat it.
Even more fun, the maker, Cartesian Cards, holds the Guiness World Record for the smallest deck of cards. Oh and they are working on the largest deck next.
Price: $19
