Can I get a second opinion on this license

Ah, was just looking through the site more and noticed on one page this:

* It complys to the OSI definition: http://www.opensource.org/docs/definition.php
* It complys with Debian Free Software Guidelines: http://www.debian.org/doc/debian-policy/ch-archive.html#s-dfsg
* The license is the result of a week long discussion with input from a license expert at Fedora.
* The whole OSS thing have started to take more time then it's actually worth.
* No, it will not get changed because you complain.

So I would say that this is fine then.

Oh, and checking apt-get, teeworlds is actually available... I should check further before posting.

For me that's is free software, it adapts to the 4 freedoms. :D

El dg 10 de 01 de 2010 a les 11:11 +0100, en/na name at domain va
escriure:
> The game Teeworlds has this license, it seems fine to me, though it's not a
> standard license. Anyone else agree or disagree that it's a Free software
> license?
>
> Here is the license text:
>
> Copyright (C) 2007-2008 Magnus Auvinen
>
> This software is provided 'as-is', without any express or implied
> warranty. In no event will the authors be held liable for any damages
> arising from the use of this software.
>
> Permission is granted to anyone to use this software for any purpose,
> including commercial applications, and to alter it and redistribute it
> freely, subject to the following restrictions:
>
> 1. The origin of this software must not be misrepresented; you must not
> claim that you wrote the original software. If you use this software
> in a product, an acknowledgment in the product documentation would be
> appreciated but is not required.
> 2. Altered source versions must be plainly marked as such, and must not be
> misrepresented as being the original software.
> 3. This notice may not be removed or altered from any source distribution.
>
> ------------------------------------------------------------------------
>
> IMPORTANT NOTE! The source under src/engine/external are stripped
> libraries with their own licenses. Mostly BSD or zlib/libpng license but
> check the individual libraries.
>
> ------------------------------------------------------------------------
>
> With that being said, contact us if there is anything you want to do
> that the license does not premit.
> _______________________________________________
> Trisquel-users mailing list
> name at domain
> http://listas.trisquel.info/mailman/listinfo/trisquel-users

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The license respects all four freedoms:

0. the freedom to use the work,
1. the freedom to study the work,
2. the freedom to copy and share the work with others,
3. the freedom to modify the work, and the freedom to distributed modified and therefore derivative works.

In addition, the license prevents someone from redistributing the software as non-free, so it's also copyleft.

And unlike Mozilla Firefox (which is under the Mozilla License), for example, a user that modifies the software is still allowed to advertise it as a version of "Teeworlds".