In the context of the study of symmetry, Atractor developed GeCla program (for Mac and Windows) and it can be downloaded for free:
Unlike previous versions, the new version of GeCla does not require prior installation of Atractor's DVD, which simplifies installation process.
We strongly advise you to always use the latest version of GeCla (specially in competition mode).
Version beta 0.94 - 2015/03/20
Languages presently supported: (Soon:)
(**) All the software available on this site is distributed as executable code under the conditions of a license "Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License". We hope you found it interesting and useful. If you wish to support Atractor's activities you can do so through a donation.
Your donation should be made by bank transfer to the account:
BIC SWIFT CGDIPTPL
Rua de Ceuta nº 118, 5º
4050-190 - Porto