I tried a few Pop Cap games and found several of them really fun. I decided to splurge, and bought the 44 game package for $99. I tried all the games, and made a list showing touch screen compatability.
Please note that most of the games require a player name to be entered, but after that don't require keyboard input. I also didn't play all the way through any of them, so there are some modes and levels that I didn't try. Consider this list a starting point, and not the final word.
Alchemey:
Partially compatible - dragging objects doesn't work good enough with my touch screen
Amazing Adventures Around The World
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Fully compatible
Did not test modes that needed to be unlocked
Amazing Adventures The Caribbean Secret
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Fully compatible
Did not test modes that needed to be unlocked
Amazing Adventures The Lost Tomb
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Not compatible - Puzzle mode requires right mouse click to rotate puzzle pieces
AstroPop
(Requires player name entry)
Not compatible - capture bricks with left mouse click, release with right
Bejeweled 2
(Requires player name entry)
Fully compatible
Bejeweled Twist
(Requires player name entry)
Fully compatible
Big Money
Fully compatible
Bonnie's Bookstore
(Requires player name entry)
Fully compatible
Bookworm
(Requires player name entry)
Fully compatible
Bookworm Adventures
(Requires player name entry)
Fully compatible
Bookworm Adventures: Volume 2
(Requires player name entry)
Fully compatible
Chuzzle
(Requires player name entry)
Fully compatible
Cosmic Bugs
(Requires player name entry)
Not compatible - Requires right mouse click to rotate ship and escape key to exit if playing a level
Dynomite
Partially compatible - aiming doesn't work well
Escape Rosecliff Island
(Requires player name entry)
Fully compatible
Feeding Frenzy
Not compatible - movement doesn't work properly
Escape key needed to exit when playing a level
Feeding Frenzy 2
Not compatible - movement doesn't work properly
Escape key needed to exit when playing a level
Hammer Heads
(Requires player name entry)
Fully compatible
Heavy Weapon
Partialy compatible - users hand covers screen, making it hard to play
Iggle Pop
(Requires player name entry)
Not compatible - Requires escape key to exit level
Insaniquarium
(Requires player name entry)
Fully compatible
Mahjong Escape Ancient China
(Requires player name entry)
Fully compatible
Mahjong Escape Ancient Japan
(Requires player name entry)
Fully compatible
Mystery PI: Lost in LA
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Fully compatible
Mystery PI: New York Fortune
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Fully compatible
Mystery PI: The Lottery Ticket
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Fully compatible
Mystery PI: The Vegas Heist
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Fully compatible
Mystery Solitaire
Full screen mode didn't work with my touch screen, uncheck full screen and it works
(Requires player name entry)
Fully compatible
Peggle
(Requires player name entry)
Partially compatible - aiming doesn't work well
Peggle Nights
(Requires player name entry)
Partially compatible - aiming doesn't work well
Pixelus
(Requires player name entry)
Fully compatible - needs fine movement control
Pizza Frenzy
(Requires player name entry)
Fully compatible
Plants vs Zombies
(Requires player name entry)
Fully compatible
Rocket Mania
(Requires player name entry)
Fully compatible
Talismania
(Requires player name entry)
Partially compatible - Right mouse click can't be used
The Wizards Pen
(Requires player name entry)
Not compatible - Keyboard required
Typer Shark
(Requires player name entry)
Not compatible - Keyboard required
Venice
(Requires player name entry)
Not compatible - aiming doesn't work well enough, right mouse click can't be used
Waterbugs
(Requires player name entry)
Not compatible - Requires right mouse click to rotate ship
Word Harmony
(Requires player name entry)
Fully compatible
Zuma
(Requires player name entry)
Partially compatible - Right mouse click can't be used to swap stones
Zumas Revenge
(Requires player name entry)
Partially compatible - Right mouse click can't be used to swap stones