[BitTorrent](http://en.wikipedia.org/wiki/BitTorrent) can be an efficient way to "host" a large data set that are static. Also, BitTorrent is a good mechanism distribute a large data set as part of a open data project without funding or official government recognition. As mentioned [here](https://opendata.stackexchange.com/a/843/1511):

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> Depending on the level of interest, you might find it difficult to retain seeders.
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If a person has ample disk space and bandwidth, **what are some open data torrents to seed for the greater good of the community?** It would be helpful to include links to description, purpose, and compressed/uncompressed file size.