This is the old website. See minetest.net.
Extract the zip package somewhere. Run the executable found in the bin/ folder. Also see the Getting started page in the wiki.
If you have problems, see this wiki page.
These packages have not necessarily been created by any of the developers of Minetest. Contact the authors of the packages in case of problems (at first).
NOTE: If you use daily/unstable versions on servers or persistent worlds, make sure to backup them periodically.
If your distribution is not listed here, you can get the source code and compile Minetest-c55 yourself.
If you have packaged Minetest-c55 for some other distribution, contact me so I can link to it.
There exists a FreeBSD port. It is quite outdated as of 2012-01-19.
It is known to compile relatively easily on OpenBSD at least. It should work quite fine on all platforms on which Irrlicht works.
You need 'minetest' and 'minetest_game'.
Note: minetest_game goes in the games/ directory of minetest. Rename it as minetest_game (instead of the long name in the package).
See the included README.txt. (README.txt of latest dev)
You may also want to look at this automated cross-mingw build script.