L web dev - Polis - .cy      

The Top 10 Free Icon Sets For Web Designers In 2009
http://www.webdesigndev.com/roundups/the-top-10-free-icon-sets-for-web-designers-in-2009
The Top 50 Web Development Icon Sets from 2009 (or here)
http://speckyboy.com/2009/12/21/the-top-50-web-development-icon-sets-from-2009/

http://developer.apple.com
http://developers.sun.com/devtools/
http://code.google.com/
http://developer.yahoo.com/
http://www.adobe.com/devnet/
http://msdn.microsoft.com/en-us/default.aspx
http://www.asp.net/

Linux Development
http://developer.gnome.org/ 
http://www.gnome.org/get-involved/ 
http://community.kde.org/Getinvolved  
http://community.kde.org/Getinvolved/development  

Other
http://www.programmableweb.com API Directory/Mashups/...
http://www.wix.com made a flash site with no programming involved
Web Apps(PHP): http://drupal.org, http://www.joomla.org CMS -
http://wordpress.org BLOG [http://buddypress.org WordPress plugin]
http://jquery.com + http://jqueryui.com RIA / Javascript / Ajax Library
http://en.wikipedia.org/wiki/List_of_JavaScript_libraries
http://javascriptlibraries.com
http://en.wikipedia.org/wiki/List_of_content_management_systems

Top 50 WebSites for Web Developers (Sept 2009)
http://www.websitemagazine.com/content/blogs/posts/pages/top-50-websites-for-net-professionals.aspx