Zingles for

From Absolutist:

Zingles is a simple yet highly addictive logic puzzle game. Simply complete the board ensuring that each row, each column and each sub-grid only contains one instance of each piece – a Zingle piece! The player can enter any external puzzle and use the solver to generate a solution. The game allows you to play an unlimited number of games simultaneously. Easy, medium and hard levels of game play are available.