xMxmlCompiler is an eclipse plugin that provides an Eclipse Builder on mxml resource changes and a GUI to the Flex 4 compiler (mxmlc) of the open SDK. It run on GNU/Linux and Windows eclipse platform version.
FlexBean is a Netbeans' plug-in for Netbeans 6.5. It aims to provide a Flex support (~ Flex IDE) for Netbeans IDE. So, you can create/compile/run/... Flex projects with your lovely Netbeans IDE !!