OpenHIE is an initiative that aims to provide a reference architecture and workflow specifications for sharing health information between point of care systems in low resource settings. It aims to be standards-based and open such that components of the architecture can be swapped out as is necessary. OpenHIE is made up of a number of sub-communities that each aim to discuss a particular component of the architecture. Each community maintains a reference implementation of their particular component.
For more information see the OpenHIE website.