Germany (2)
– Donaubüro – gemeinnützige GmbH, Ulm
– German National Tourist Board
Austria (4)
- DANUBEPARKS – Danube River Network of Protected Areas (International)
- Danube Delta Biosphere Reserve Authority (Romania)
- Rusenski Lom Nature Park (Bulgaria)
- Persina Nature Park (Bulgaria)
- Vojvodinasume (Serbia)
- Lonjsko Polje Nature Park (Croatia)
- Kopacki-rit Nature Park (Croatia)
- Duna-Dráva National Park (Hungary)
- Duna-Ipoly National Park (Hungary)
- Fertö-Hansag National Park (Hungary)
- BROZ – Regional Association for Nature Protection and Sustainable Development (Slovakia)
- Donau-Auen National Park (Austria)
- Donau-Auwald Neuburg-Ingolstadt (Germany)
– WWF Danube-Carpathian Programme (WWF-DCP)
Slovakia (4)
Hungary (2)
– Zsolnay Heritage Management Nonprofit Ltd.
Croatia (2)
– Tourist Board of Vukovar-Srijem County
– International Cooperation Office – TINTL
Serbia (36)
– National Tourism Organisation of Serbia
– Tourist Organization of Belgrade
– Tourism Organisation of Vojvodina
– Tourist Organisation of Municipality Majdanpek
– Tourism Organisation Sremski Karlovci
– Tourist Organisation of Veliko Gradište
– Tourism Organisation of Municipality Golubac
– Tourism Organisation of Municipality Kladovo
– Tourism Organisation of Municipality Negotin
– Tourist Organisation Požarevac
– Tourism Organisation of Smederevo
– About the Danube – for the Danube
– Istar 21 – Cluster for developing tourism along the Danube
– Camping Association of Serbia
– National Association of Handicrafts – Our Hands (NGO)
– Danube in Heart – Dunav u srcu
– H.T.P. Plaža D.O.O.
– Silver Lake Investment D.O.O.
– Centre for Tourism Research and Studies
– Welcome to Lepenski Vir D.O.O.
– Faculty of Applied Ecology Futura
– The Homeland Museum of Knjaževac
– Veselinov Tourism Consulting
– 4SE
Romania (12)
– Travel Communication Romania
– Travel Focus Romania Association
– Danube Office Mehedinti – MH County Council
– Association of Ecotourism in Romania
Bulgaria (4)
– Bulgarian Association for Alternative Tourism (BAAT)
– Odysseia-in Sport and Travel Agency Ltd.
– Agency for Regional Development and Business Center – Vidin
– Rousse Regional Museum of History
Ukraine (4)
– Agricola (NGO)
– LTD tour operator ‘Vilkovo – Pelican – Tour’
– Department of Culture, International Cooperation and European integration of Odesa City Council