InkScape plugins related to bobbin lace.
To install the plugins, download a released version or the most current one and unpack. Start InkScape and look for the location where to put the desired inx/py pairs of files:
Edit > Preferences > System: User extensions
After a restart of Inkscape, the new extension will be available.
More information about the individual plugins and related tools are available on d-bl.github.io. Below a screenshot with the dialogs of the plugins. Note that the dialog for lace grounds asks for the files in the input directory of the download.