CDC's public-domain public health statistics tool for epidemiological surveys and data analysis.
Epi Info is a suite of public health data tools from the US CDC, used for questionnaire forms, data entry, epidemiological statistical analysis, maps and reports. It is officially described as public domain / open-source software.
Use cases: public health statistics, epidemiological surveys, questionnaire data, field surveys
Note: Epi Info has entered its sunset phase; keep an eye on its official maintenance status and alternatives.
