Des chiffres is available for download
- Hobbes.
"Des chiffres (et des lettres), (Letters and) Numbers, Cijfers (en Letters). 75 solvable games, with a reset button and a (red) undo button per game. The goal is to arrive at the three-digit target number, by using the 4 basic arithmetic operations applied to 6 original numbers. Each number, the 6 original numbers and upto 4 new calculated numbers, can be selected once. Using all 6 original numbers is not mandatory. Only integers should be used at any stage of the calculation."
Source: eCSoft/2