Spider Solitaire is one of best-known two-deck solitaires, despite the fact that it's an extremely difficult game to win. It seems to inspire a fanatic devotion among some players. Perhaps the rareness of a win makes it all the more satisfying when, once in a while, it does come out.
You can try Spider solitaire right now, please download a free demo version (limited to the timed game only).
Minimum requirements:
Windows Mobile for Smartphones version 5.0 or greater
QVGA (320x240) screen resolution
350K free memory
Main features:
Supports both QVGA portrait and landscape orientation