Diagrams
The screenshot snippets show either pair diagrams or thread diagrams of a rose ground, which differs from a Flanders ground by using four pairs per pin versus two pairs per pin.
GroundForge is a toolbox to design bobbin lace grounds or braids.
Generates thread diagrams out of color coded pair diagrams, supports any stitch. Various collections of predefined patterns or create your own patterns.
Ground From Template only pair diagrams. Regular or wrapped around a circle. Comes with a collection of predefined patterns. On tesselace an explanation to "Design Your Own Templates".
The old generators may still have a use case but they are no longer maintained.
Limited set of stitches. Fixed set of patterns. Thread diagrams only from a table of stitches. The dedicated InkScape plugin to change thread styles is not upgraded to Inkscape 1.0.
Only about a dozen traditional grounds and braids. An export of stitch by stitch images can be imported by third party tools to create an animated image that show a working order. You can try to execute it with OpenJDK 8.
Flanders only. No Pair diagrams. Works even with old browsers.
Grids
Polar
More patterns than the plugin and it scales better. You can design your own patterns, though the definitions might be a bit cryptic.
Allows matching nested grids. Less patterns than the web-based version but you can add your own marks for one pie and have it automagically repeated to a complete circle.
Regular
The built-in grid feature of InkScape only provides snapping points. This plugin generates printable dots with configurable size, distance and angle.