Forum Discussion
List Of All Office 365 Services
maybe this image is of help!
They used to have a spreadsheet which was pretty comprehensive but it has been retired. This gets tremondously complicated if you need to look at foreign countries (not every thing is available in every country) or if you need to consider Government (which does not have everything). Education gets some stuff that Enterprise doesn't have (e.g. Forms and other stuff).
In addition to the Service Descriptions linked to above, there are the various services that you get with the EM+S suite (Azure AD Premium, Azure Info Protection, Intune, etc) that effectively extend Office 365 service functionality.
There is a very nice infographic at https://www.linkedin.com/pulse/office-365-isnt-just-cloud-kirsty-mcgrath. It is a few months old, so it is slightly incomplete, but it does a great job of conveing just how much stuff is in the suite.
Still looking for a complete list - for example, Forms isn't on there.