NVivo can be used with EndNote. A Library (or references) can be exported from EndNote to NVivo.
Work with EndNote references in NVivo, to explore the literature:
Many thanks to Dr Leonie Daws (Kihi Consultancies) 2015 for her kindness in sharing these documents.
NB: At this stage the MAC version of NVivo doesn't offer this full functionality.
Explore the literature (from your EN library) in NVivo
Export an EndNote Library into NVivo