Geoportal CSW Clients
OWSLib
MetaSearch (QGIS plugin)
deegree
eXcat
GeoNetwork opensource
CatMDEdit
EUOSME
GIMED
Metatools (QGIS plugin)
QSphere (QGIS plugin)
OGC CSW 3.0.0 compliant
OGC CSW 2.0.2 compliant
OSGeo Project
Open HUB