A collection of plug-ins primarily intended for designers of bobbin lace patterns. The plug-ins draw various types of printable grids of dots or pair diagrams. For non lace makers: pair diagrams are two-in-two-out digraphs. Some tools have a BSD license, others a GPLv3. An older release of the plugins (for a pre 1.0 version of InkScape) has a 5th plug-in, it complements an interactive online tool. This tool is replaced by GroundForge on https://d-bl.github.io/ The tool generates thread diagrams from pair diagrams. The new tool groups the segments of a line and doesn't need the 5th plugin any more.