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The new Module Repository is in a design and specification stage, and most likely needs additional engineering support to begin development. Elliott Williams is blogging about the module repository at http://blog.elliottwillia.ms.
currently under development led by Unlicensed user. Project source is at https://github.com/elliottwilliams/openmrs-contrib-modulus.
Summer 2013 Project
The Module Repository Project was initially a goal during the summer of 2013, but was largely abandoned. Planning is archived here, and may still be useful in design of the current incarnation of the project.
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