Are X and CBE free?
Yes, you may download the libraries at no cost - but please read what we mean by free.
Is there free technical support?
Yes, you can get no-cost technical support at the forums - but I do not provide free support by eMail for your application.
May I use CBE at work, or in a commercial project?
Yes, you may use the libraries in your business projects, even if that project includes proprietary code, but the X and/or CBE library must retain its GNU LGPL and free status. See the license for details.
May I modify the library?
Yes, you may modify and/or extend the libraries, but the resulting library must retain its GNU LGPL and free status. I have license and copyright comments at the top of each source file. Leave those comments intact and add your own comments explaining your modifications to the file. See the license for details.
Do I have to give you credit?
There is a copyright and license statement at the top of each source file. Please leave that intact. A link back to Cross-Browser.com would be appreciated but is not required.
I'm still working on this...
The author of a contribution retains copyright. I do not require copyright assignment for contributions to X. By "contribution" I mean a function, object, or at least 10-15 (or more) lines of code.
X is distributed under the terms of the GNU LGPL (GNU Lesser General Public License). Your contribution must abide by this license.
The name of an X function or object should begin with a lower-case 'x' and then be camel-cased.
Please don't use tabs - use spaces for indentation.
Please make your function/object work with XC (e.g. no implicit statement termination). Read more about XC and how it has affected the structure of the X Library.
Note that XC compression does not remove multi-line comments (/* ... */) but it does remove single-line comments (// ...).
I am proud to include your contribution in the official X distribution - but it is your responsibility to document, test and maintain your function or object.
For more information on copyright, copyleft and what we mean by 'free software' and 'open source', visit the following sites.
GNU Project
Free Software Foundation
Open Source Initiative
U.S. Copyright Office
Do you have a suggestion for something to add to this FAQ? Please let me know.