How do they do that?

Hi, I am the admin for www.HmongVillage.com.  We are essentially a non-profit entity who is seeking to help, share and preserve the Hmong people and their culture.<br /><br />I am posting here because I want to offer free webpages to anyone who is interested in being a part of our Hmong community.  This includes both individuals as well as community groups.  However, we would like to ask for sponsors and leave our &quot;mark&quot; on those free pages.<br /><br />I am wondering...who do they do that?  I look at these sites and they seem to use the same software apps to generate their member pages.  However, there is no link to those applications and when I tried to contact them, I did not get an answer.<br /><br />Can someone tell me about what applications these people use?<br /><br />Sites with apps I am interested in:<br />www.zuup.com<br />www.asianavenue.com<br /><br />Sites with similar apps:<br />http://www.100webspace.com/<br />http://www.websiteallies.com/faq.htm<br /><br />Please help.  Thanks in advance.<br /><br />Partners in Serving the Hmong,<br /><br /><br />xfwayne