NVivo
NVivo is a powerful qualitative data analysis tool, used widely by researchers to organise and analyse a wide range of qualitative data types.
NVivo allows you to import data from a wide range of other programs and sources and analyse it with powerful management, query and visualisation tools. It has a particularly strong application for large projects with complex sets of data, including interviews, archival material, and survey data and also works really well for literature reviews.