List management is not yet provided in the Web Client. It's recorded as a requirement, and is something we'd like to provide 1st half of this year.
We do already have a lot of the building blocks in place to support this feature, as we can support arbitrary containers of custom items (i.e. items with custom properties) and configurable UI.
Thinking aloud, one way we can support this is by providing the notion of a List Space where the type of content to be created is restricted (for example a Todo item). A simple UI screen for defining the properties of the item could also be provided. Then, the usual Space functions can be used to manage the list e.g. create, update, delete, search etc with all the other possibilities of permissions & rules. Is that the sort of capability your after?