For Oslo in Norway you can go to ruter.no, punch in where you are and where you want to go. It then gives you options on how to get from point A to point B using various public transportation (and walking).
Is there a list of such services in other countries somewhere? In particular I'm curious to know if there is such a service for London, UK.
Below is an incomplete list of domestic public transportation planners. Those usually do not include international transportation, except trains in the case of Bahn.de. Intercity buses may or may not be included, depending on the country.
journey planner <city> or journey planner <country>Google Transit offers global transit planning, with very thorough coverage of the U.S. and Canada— in fact, most of the participating agencies use Google in lieu of an independent service. It is accessible in Google Maps.
HopStop similarly provides trip planning for nearly all major and many minor cities in the U.S. and Canada, and offers iOS, Android, and Windows Phone apps.
TicketBus.com.mx for intercity schedules across a variety of bus companies.
Mexico City (Distrito Federale) - Metro Origin-Destination (English)
Most local and regional transit planners are provided by the operating agencies, and may not reflect all options. For example, commuter rail and rapid transit are often administered separately, and a trip planner for one service will often exclude other options.
NortheastIs there a list of such services in other countries somewhere?
No, I don't think such a global list exists—at least anything that's comprehensive and up-to-date.
Instead, your best bet is to simply google:
journey planner <city>
This works for pretty much every city that has an online journey planner (also called route planner or trip planner). Including London.
Update: The answers to this question right here might be the best attempt at such list. :-) Still, they are far from comprehensive (there are many cities with a journey planner).
Sydney
Melbourne
You should try Google Maps. There you can enter a starting point and a destination, and Google Maps calculates routes for you. In most countries. respectively regions, public transport, private motorized traffic, and pedestrian routes are covered.
For example if you want to go from the Buckingham Palace to the Hardrock Cafe in the neighbourhood, Google Maps gives you the following route if you want to travel by car:
But if you're keen to walk, you get another route:
Many public transport systems will have similar planners on their website, so that's a good place to start. eg, if you're in New York, the MTA website has a good route planner. For London, it's on the Transport for London website.
The other option that provides coverage for multiple cities in multiple countries is Google Maps which allows you to search for a trip via car, public transport, walking or bicycle - although the exact options will vary depending on the region/city. Google also has the ability to start or end a trip at "My Location" (just type that into the location box) and it will do it's best to automatically work out exactly where you are.
Israel
*-not including Palestinian territories in the West Bank and the Gaza strip.
trains
The train system in Israel is under one national company, so all train times, destinations and prices can be viewed on the Israel Railways site.
Train tickets are bought at the station, either from a cashier or an automatic machine.
buses
There are several bus companies in Israel, most of them operate in different areas. This site allows to search for buses from all companies, and has links to all the sites of the different companies. The site gives both lines inside cities and between cities. Includes buses to territories under Israeli control in the west bank.
Tickets are usually bought from the driver in the bus. If you get to the bus in a central station, a ticket can be bought in the station, but isn't mandatory.
The only exception is buses to Eilat. Tickets to Eilat and its surroundings need to be bought in advance on-line or at a central bus station. Site for Eilat booking
other
Inside Jerusalem exists a light rail: their site.
An underground train exists only in Haifa, and it has only six stations, the Carmelit's site
Flights are available to/from Haifa, Tel-Aviv and Eilat. Tickets are bought trough the airline site, or through travel agencies or flight booking sites. Sites for the airliners: El-Al, Arkia and Israir.
To answer your query about transport planning for London, "Transport for London" (TfL) has an A to B journey planner available on their website:
http://journeyplanner.tfl.gov.uk/
You can set numerous options including date/time of travel, preferred mode of transport, mobility needs (impaired mobility?) and whether you prefer speed vs convenience (changes/walking distance).
Note that A and B can be a station, bus stop, postcode (known as zip code in some locations) or 'place of interest'.
In addition for Australia:
Western Australia Transperth quite competently covers most of the state for bus, rail and water public transport.
Victoria
Public Transport Victoria- never used it but should cover Victoria
http://ptv.vic.gov.au
Queensland Translink- had to tell the coverage but at least covers the major tourist areas of Cairns and Gold Coast.
Japan
https://world.jorudan.co.jp/mln/en/?sub_lang=nosub
(Never tried this English version, but have used the Japanese version for ca 20 years, works well, and at least nowadays also includes domestic flights) (Often cheaper than train)
