CalculiX is a free and open-source finite-element analysis application that uses an input format similar to Abaqus. It has an implicit and explicit solver (CCX) written by Guido Dhondt and a pre- and post-processor (CGX) written by Klaus Wittig.[1] The original software was written for the Linux[2] operating system. Convergent Mechanical has ported the application to the Windows operating system.[3]
CalculiX official page
CalculiX channel in Discord
CalculiX Discourse Group
CalculiX in GitHub
calculix.kharkov.org – my blog about CalculiX