GeoKalk

Structural geology deals to a great extent with the operation of vectors and tensors. GeoKalk (previously GeoCalc) is a calculator for vectors (lines and planes), and tensors (strain and stress). GeoKalk is a document based application. Multiple calculators can be opened and saved as independent documents. Multiple entries can be operated using tables. Entries can be load from and written to text files. Lines and planes can be visualized in a stereonet, and strain and stress in a Mohr circle. In 3D stress, the stereonet and Mohr circle can be coloured by slip tendency. Besides being a great tool to learn vectors and tensors and their application to geology and engineering, GeoKalk is a powerful tool to perform operations on thousands of vectors or tensors. GeoKalk was made for geologists, but it can be used by anyone interested in vectors and tensors. GeoKalk runs on Mac OSX 10.8 or later. It is available for free on the Mac App Store.