Dat is powerful open source tool that lets user share large datasets, the goal being a collaboration flow similar to what git offers for source code. The dat project is officially a project of the US Open Data Institute, a not-for-profit organization based in the United States, but they work towards sharing data across the galaxy.
dat is primarily intended as a command line tool. There is also a programmatic API that you can use in node.js programs for more advanced use cases, as well as a way to have dat call programs written in other programming languages to transform data. dat is currently pre-alpha. You can test it out or hack on it now, but all things are subject to change.
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