Downloading Crosswise 1.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Games, more precisely Board. This software for Mac OS X was originally created by Planet Spogg AB. We recommend checking the downloaded files with any free antivirus.
From the developer:
Crosswise is a classic crossword game similar to Scrabble. However, in Crosswise everyone place their word at the same time, so there is no need to wait for your turn. Play up to three other players in a game, place your best word and catch the multipliers to score big.
You may want to check out more software for Mac, such as Doublemill, which might be related to Crosswise.