http://www.hotscripts.com
-- ASP, C C++, CFML, flash, Java, Javascript, PHP, Perl, Python, Remote Hosts and XML scripts (>15000)

http://www.resourceindex.com
-- CGI and PHP (>10000)

http://www.scriptsearch.com
-- ASP, CFML, C and Cpp, Flash, Java, JavaScript, PHP, Perl, Python, Remotely Hosted, Visual Basic and XML scripts (>10000)

http://www.freshmeat.net
-- Everything

http://www.devscripts.com
-- ASP, Coldfusion, JavaScript, Perl, PHP

http://www.phpbank.net
-- PHP funnily enough

http://www.scriptz.com
-- Only small, but has PHP, JavaScript, Perl and ASP. There are spaces for C C++, CFML, Python and XML

http://sourceforge.net/
--free Open source, 国外最著名的开源组织，上面可以找到成千上万的开源项目，包括apache ,mysql ,php,phpbb,....