Jisc suggested data set for the CW17 Hackday team, you can still win even if you don't use them.
CORE’s mission is to aggregate all open access research outputs from repositories and journals worldwide and make them available to the public. In this way CORE facilitates free unrestricted access to research for all.
CORE is available as open data – (please check the license of the content in the dataset)
equipment.data is a catalogue of UK research equipment; allowing accessibility with the aim to stimulate collaboration.
SHERPA is investigating issues in the future of scholarly communication. It is developing open-access institutional repositories in universities to facilitate the rapid and efficient worldwide dissemination of research.
SHERPA REF public API - https://ref.sherpa.ac.uk/api (the data is CC BY-NC-SA licensed)
Other SHERPA services have APIs that are rate limited to 500 requests/day unless you register for an API key and like SHERPA REF their data is licensed CC BY-NC-SA