Gex is a Catalan self-learning program that has been developed by the Catalan Language Service of the University of Barcelona (Catalan Language Area of the University of Barcelona). The program is very valid for students who wish to improve their knowledge of Catalan as well as for interested people who start from scratch.
Gex contains very varied exercises for self-correction of spelling, morphology, lexicon, syntax, etc. It is a very complete program that allows you to review all the fundamental aspects of Catalan, and especially ideal for people who want to learn it (or improve it) on their own.
You can free download Gex 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.