Statistical packages

Statistical software is one of the most important software for epdiemiologists. For a detailed review see the list of comparison of statistical packages from Wikipedia. The most important ones are listed here

R = Open source statistics package

Stata = statistic software

SPSS =statistic software

GraphPad Prism = statistic software focused on graphs

Openepi = Open Source Epidemiologic Statistics for Public Health

Atlasti = Qualitative statistics software

Joinpoint =  analysis of trends using joinpoint models

Atrisk =  risk analysis using Monte Carlo simulation

Quick guide for experienced users of other statistical packages (e.g., SASSPSSStata) who would like to transition to R 

GIS software

Geographical information systems are used for displaying and analysing geographic data. For a detailed list see the list of GIS-software from WikipediaThe most important ones are listed here

Acrgis = frequently used program

Quantum GIS = Open source GIS program

Regiographbusiness mapping software

Data entry software

Epidata = data collection instrument released by the non-profit organisation "The EpiData Association" 

Epiinfo = data collection instrument by CDC

Social network analysis

Cytoscape = Open source social network analysis tool

Online questionnaires software

Limesurvey = Open source online questionnaire tool

Select survey 

Survey monkey