There aren't many ways to spice up a game of solitaire (except perhaps combining it with strip poker) but this is one of them.
Big Solitaires 3D is a collection of 40 solitaire games made with OpenGL 3D rendering. The latest release features four different bitmaps decks, new image backgrounds, an option to load your own personal image background a few extra jazzy transitional effects and the game Klondike. The number of variations of solitaire here is a little overwhelming but a sample of what you can choose from are Canfield, Corona, Doubles, Easthaven, Emperor and Forty Thieves.
The game controls and features aren't exactly spectacular but it's the 3D graphics that give this collection something special. Within the games, you can elect to go fullscreen or window mode in any resolution that's supported by the particular game you've chosen. You can choose a number of camera angles and you can perform redos and undos for moves. You can also spice things up a bit by going for three decks of cards instead of one or two. You can also choose what style you want the decks to be in - retro, fun or old style. For solitaire addicts, the game also keeps stats on your exact performance during a game meaning that you'll always find new ways to improve yourself.
Note that you'll need a decent graphics card though because on older machines, Big Solitaire 3D does demand a lot from it.
This is solitaire heaven for fans of the game with some beefy graphics although nothing much more in the way of innovation.