Freeciv is copyleft licensed under the GNU General Public License (version 2 or, at your option, any later version). This means you can give it to whomever you want without paying us anything or asking us for permission. If you make changes to it, read what the license says about sharing your changes before distributing.
For distributors who wish to include Freeciv on CD or DVD: We approve (morally) of distribution of Freeciv on CD/DVD along with computer magazines. You do not need to contact us to seek this approval, you can distribute Freeciv for free or for a fee under the GNU GPL just like everyone else.
Be aware that the GPL requires you to distribute source code along with the program. We recommend putting the .tar.gz compressed source code of the same version of Freeciv that you wish to distribute in the same directory on the CD/DVD as the binary compiled version. You do not need to provide means for the user to install the source code, nor provide any user support for it. Unfortunately, it is not sufficient to provide an URL link to the source code, or offer it on FTP (see this link for more info).
The GPL license is the only license or permission that Freeciv can be distributed under. We will not (and cannot) give any other permissions for distribution, nor will we offer any kind of warranty or indemnity.