Most users appear to favor eclipse and there are kints on how to use
it with ns-3 in the wiki:
http://www.nsnam.org/wiki/index.php/HOWTO_configure_eclipse_with_ns-3
If you figure out how to use netbeans, feel free to create a similar
page in the wiki.
Mathieu
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Mathieu Lacage <mathieu...@gmail.com>