Has anyone an idea for a stable working WFS-T-plugin, for use with e.g. arcgis-server?
As part of solution is also the representation of the vectors in the map-window helpful, WFS without "T"
The OpenJUMP WFS-plugin should be marked as unmaintained and non-operational. It just does not work anymore and OJ developers do not have the knowledge to repair it.
Kosmo GIS has a pretty good WFS support and before summer there should be a new 2.1 version available with WFS-T. I do not know how far apart OpenJUMP and Kosmo are nowadays and if it could be possible to re-use the WFS-T plugin.
As a workaround you can use GDAL and ogr2ogr utility for reading data from WFS server and converting those as shapefile for OpenJUMP.