Greenfish Icon Editor Pro Portable :
http://portableapps.com/news/2013-07-09--greenfish-icon-editor-pro-portable-3.31-released (http://portableapps.com/news/2013-07-09--greenfish-icon-editor-pro-portable-3.31-released)
very nice :t
he has a blog site, as well...
http://greenfishsoftware.blogspot.hu/2012/07/greenfish-icon-editor-pro.html (http://greenfishsoftware.blogspot.hu/2012/07/greenfish-icon-editor-pro.html)