These are small document-parts which are used in other documents. They are not a starting point for any real activity. Because of this, they will be listed further down and the search will not list them unless requested.
2sxc is generic - and usually you will customize the output to match your site. This is easy.
For more advanced topics, check out development with 2sxc.
2sxc - Content Management for DNN
Public (can be used by everybody)
Default (all members can edit)
This catalog has a simple permission model, where all members have the same permissions. For advanced permissions, upgrade to Enterprise.