Very (very) interesting set of links

SAHANA - Home of the Free and Open Source Disaster Management System
http://www.sahana.lk

Python implementation of openEHR specifications
http://sourceforge.net/projects/oship

Open Source Software for Public Health
http://www.ibiblio.org/pjones/wiki/index.php/Open_Source_Software_for_Public_Health

Pentaho- Open Source Business Intelligence
www.pentaho.com

Models of Infectious Disease Agent Study
https://www.epimodels.org/midas/midasAvailableResources.do

Structuring an event ontology for disease outbreak detection
http://www.biomedcentral.com/content/pdf/1471-2105-9-S3-S8.pdf

BioCaster:  detecting public health rumors with a Web-based text mining system
http://bioinformatics.oxfordjournals.org/cgi/reprint/24/24/2940

Biocaster - Global Health Monitor
http://biocaster.nil.ac.jp

Global Health Monitor - A web-based system for detecting and mapping infectious diseases
http://www.aclweb.org/anthology-new/I/I08/I08-2140.pdf

A multilingual ontology for infectious disease surveillance:  rationale, design and challenges
http://research.nii.ac.jp/~collier/papers/LRE%202007.pdf

Mesh4x
http://code.google.com/p/mesh4x/

Global Disaster Alert and Coordination System
http://www.gdacs.org

…phew!