Here is the DK website for more information: https://dkblock922508958.wordpress.com
All documents can be opened in OpenOffice format or Adobe Acrobat Reader. Some drawing files are in Alibre Design (for example AD_DRW extension). Please note that if your CAD program cannot read these files, not to worry because most CAD programs can output formats that can be read by other CAD programs, so please ask if you would like another format, we will try to accomodate.
All DKblock software and hardware is released as open source hardware (OSHW) as defined by the OSHWA: https://www.oshwa.org/definition/ and under the JSON license defined at https://www.json.org/license.html