Warning, /education/marble/docs/applications-using-marble.txt is written in an unsupported language. File is not indexed.

0001 There are some applications/applets/plasmoids using Marble. They might be
0002 affected by changes of the Marble API.
0003 
0004 So it is good practice to check if the following applications compile and
0005 work after API changes:
0006 
0007 - extragear/graphics/digikam
0008 - extragear/graphics/kphotoalbum
0009 - playground/base/plasma/applets/contacts
0010 - playground/base/plasma/wallpapers/marble
0011 - playground/office/geoshape
0012 
0013 There is this link https://techbase.kde.org/Marble/MarbleUsedBy
0014 listing also applications not hosted in KDE svn.