The dRofus extension to Solibri is free, but it requires that you have access to dRofus as well as a license to Solibri Office.
For a detailed guide in how to get the dRofus Solibri extension, please refer to https://help.solibri.com/hc/en-us/articles/1500004512861-How-Do-I-Purchase-Products-and-Extensions- .
The dRofus extension to Solibri is available for Windows and Mac OSX;