A person who has no desire or plans to have children is called childfree; the term has been adopted to differentiate those who choose not to have children from those who desire children but do not (or cannot) have them.
The term "childfree wiki" also has been used to refer to any of:
- The original CFWiki (now defunct) at http://www.knitmeapony.com/cfwiki/
- Northern Colorado Child Free Wiki at http://www.renegadebrewer.com/ChildFreeWiki
Wikipedia has a page with extensive background on the childfree lifestyle.