The list is not complete, contributions and corrections are received with thank! Please take a look also here!

Overview of updates here (in German language). Take also a look here. And this nice map.

The ÖBB network

Regular NightJet services which are:

Wien-Bregenz (domestic)

Villach-Feldkirch (domestic)

Graz-Feldkirch (domestic)

Wien/Graz/Villach-Zürich

Hamburg/Berlin-Basel-Zürich

Wien-Hamburg/Düsseldorf

Innsbruck-Hamburg/Düsseldorf

Wien-Rome/Milano (runs via Klagenfurt or via Salzburg)

Wien-Venedig

Wien-Livorno (seasonal)

and

The EuroNight partnerships in collaboration with Balkan/East European countries:

Prague – Wien/Budapast (EN Metropol) also a section Budapest-Warszawa

München – Zagreb/Rijeka (EN Lisinski)

Wien-Warschawa/Krakow/Kosice

>> Advices to reach NightJet line from Britain (via Cologne)

Swedish night trains

SJ-nighttrain (Malmö-Stockholm)

SJ-nighttrain (Göteborg-Stockholm-Duved and Luleå)

The Polar Circle Express / SJ Norrlandståg (Stockholm-Kiruna-Narvik/Luleå)

Snälltåget in Sweden, seasonal (Malmö-Stockholm-Storlien/Röjan)

Berlin Night Express, seasonal (Malmö-Berlin) – operated by Snälltåget

In Norway (NSB)

Bergensbanen (Oslo-Bergen),

Sørlandsbanen (Oslo-Stavanger),

Dovrebanen (Oslo-Trondheim) and

Nordlandsbanen (Trondheim-Bodø)

In Finland (VR)

Helsinki/Turku–Rovaniemi/Kemijärvi

Tampere-Kolari

Helsinki-Moscow

In Poland (PKP)

Warszawa-Kiev

Warszawa/Wroclaw-Krakow-Lviv

Sczecin-Przemysl

Gdynia/Warszawa/Szczecin-Zakopane (separate trains)

Gdynia-Bielsko-biala

Kolobrzeg-Krakov

Swinoujscie-Warszawa

French lines – INTERCITÉS DE NUIT (couchettes only)

Paris – Toulouse – La-Tour-de-Carol (daily)

Paris – Rodez (daily)

Paris – Briançon (daily)

Paris – Perpignan – Port-Bou (runs only on Fridays, Sundays and during vacations)

Italian lines (Treni Notte)

Rome – Palermo/Syracuse (Lonely Planet: Super Sleeper Train)  ## NEWS##

Palermo-Pisa-Genova-Milano

Milano-Roma-Palermo/Siracusa (a VERY long run)

Trieste-Venezia-Roma

Lecce-Bologna-Torino/Milano

Torino-Salerno

Torino-Lecce

Milano-Lecce

Lecce-Roma (not daily)

Bolzano-Verona-Roma (not daily)

Russian services to Western Europe

Moscow-Paris

Moscow-Nice

Moscow-Berlin (Talgo)

Other Eastern European locations

Wien – Budapest – Braşov – Bucureşti Nord, is called “Dacia”, a Romanian train

Bucureşti – Curdici (at the Hungarian border) – Wien, “Ister”

Braşov – Budapest, “Corona”

Bucureşti – Chişinău

Cheb – Košice

Cheb – Hummené

Prague – Košice- Kiev

Prague – Warszawa

Prague – Budapest

Bratislava-Kiev (R 801)

Budapest-Kiev

Bucureşti-Kiev (once a week)

Beograd – Sofia

Beograd – Bar (Montenegro)

Sofia – Istanbul (Sirkeci)

Prague – Bar

Domestic Romanian trains with sleepers/couchettes:
Bucureşti-Timişoara
Constanța-Bucureşti-Arad
Bucureşti-Oradea-Satu Mare
Bucureşti-Baia Mare/Bistrița/Cluj
Bucureşti-Sighetu Marmației
Bucureşti-Vatra Dornei
Bucureşti-Suceava
Bucureşti-Iaşi
Timişoara-Iaşi (2 daily overnight trains)

Great Britain

Caledonian Sleeper: London-Glasgow/Edinburgh and further north to Fort William/Inverness/Aberdeen

Night Riviera Sleeper: London-Penzance

Trenhotel (in Spain and Portugal)

Madrid – A Coruña – Pontevedra, Rias Gallegas”

Madrid – Ferrol, “Atlántico”

Barcelona – A Coruña / Vigo, “Galicia”

Madrid – Lisbon, “Lusitania”

Lisbon – Hendaye (border to France)

Private and seasonal operations – often with car transport

Thello, Paris-Venice

BTE AutoReiseZug Hamburg-Lörrach

UrlaubsExpress, Hamburg-München-Innsbruck-Verona or Hamburg-München-Salzburg-Villach

EE-Autozug from Düsseldorf (Germany) to Livorno/Verona (Italy)

Optima Express Autoreisezug, Villach (Austria) – Edirne (Turkey)

Astra Trans Carpatic from Arad to Bucureşti Nord via Sighişoara and Braşov

Schnee Express, Hamburg – Bludenz/Schwarzach, also a variation from Holland under the brand “Ski Train”