[$] The Data Transfer Project

Social networks are typically walled gardens; users of a service can
interact with other users and their content, but cannot see or interact
with data stored in competing services. Beyond that, though, these walled
gardens have generally made it difficult or impossible to decide to switch
to a competitor—all of the user’s data is locked into a particular site. Over
time, that has been changing to some extent, but a new project has the
potential to make it straightforward to switch to a new service without
losing everything. The Data
Transfer Project
(DTP) is a collaborative project between several internet
heavyweights that wants to “create an open-source, service-to-service
data portability platform
“.

Source: LWN