KGeoTag is a standalone geotagging program.
Images can be associated with geographic coordinates by different means: On the
one hand, a matching with GPX encoded geodata can be done, on the other hand,
the coordinates can be set manually, either via drag and drop onto a map, via
bookmarks or by manually supplying them. The coordinates can be stored in the
images' Exif header and/or in XMP sidecar files.