Crossdown is described as 'professional tool for crossword puzzle development application with advanced features for print and publishing to the web, as well as a librarian for managing a local database of puzzles and a cluebank for managing a database of clues'. There are six games similar to Crossdown for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is Crossword Compiler. It's not free, so if you're looking for a free alternative, you could try Crosshare. Other Crossdown like games are Sympathy Crossword Construction (Paid), Crossword Weaver (Paid), Beekeeper Labs CrossFire (Paid) and Crossword Studio (Paid).
Crosshare is a community for crossword constructors and solvers. Each day we post a new mini crossword puzzle you can play for free. There is a free online crossword constructor featuring powerful autofill as-you-type. Constructors can also upload existing .
CrossFire is a Java based tool for creating professional crossword puzzles. Advanced features: - Fully interactive grid fill. - Automatic "quick grid fill" provides information on where and why unfillable grids fail.