This is a copy of stackdump with data already imported from stackoverflow.com and these *.stackexchange.com sister sites:

android, askubuntu, codereview, crypto, cs, cstheory, datascience, dba, diy, dsp, gamedev, gaming, gis, graphicdesign, japanese, lifehacks, math, mathoverflow, networkengineering, opendata, photo, pm, productivity, programmers, security, serverfault, sound, superuser, tex, travel, unix, ux, vi, webmasters.

The source data is archive.org's 2015-03-16 stackexchange data dump. You could recreate the data in this torrent by downloading stackdump and importing the stackexchange data yourself, but it would take about 30 CPU-hours, more than 8GB of RAM and lots of disk space. This torrent saves you that work, and is ready to use.

Once downloaded and the .tar.gz unpacked, to start up a webserver on http://localhost:8080 run this in the stackdump directory:
Code: ./start_solr.sh &
./start_web.sh
To shut down the webserver, Ctrl+C, fg and Ctrl+C again.

You can add or remove other stackexchange sites to stackdump using data from the official dump. For instruction on how to do that see stackdump's page, linked at top. You can also update stackdump itself if new versions appear -- it's a functional Mercurial repository.

Stackdump should be able to run on any platform that has Python and Java. I've tested it on Linux and Windows, but others should work too.

NOTE: If you're getting a 'module' object has no attribute 'PROTOCOL_SSLv3' error on Debian when launching start_web.sh, you might need to delete line 42 from stackdump/python/packages/requests/packages/urllib3/contrib/pyopenssl.py. (Debian has disabled SSLv3 in their Python package due to the POODLE vulnerability -- hopefully the stackdump maintainer provides an official fix/workaround in the future, but this seems to work).