CardFun
Hearts, Spades, Gin Rummy and Asia's Best, with no ads. Canasta and Rummy 500 come with the paid key.
SwiftChess
A fast chess variant on a 6x6 board.
GiggleMaker
Add comic speech and thought bubbles to pictures and videos.
FaceTagger
Tag the faces in scanned family photos so the names are never lost.
StoryAnchor
A continuity tracker for authors: characters, places and facts, kept straight.
Sudoku games
SudokuMaestro (numbers), SudokuMusic (music notes), SudokuZoo (animals) and SudokuPortrait (portraits). Free to start.