What addresses are your applications talking to?

watch "lsof -i -P |grep ESTABLISHED |awk '{printf \"%15.15s \\t%s\\n\", \$1, \$9}'"
Shows which applications are making connections, and the addresses they're connecting to. Refreshes every 2 seconds (watch's default). Test on OSX, should work anywhere watch and lsof work.
Sample Output
         Finder         localhost:53255->localhost:26172
	imagent         mycomputer.foo.com:59319->qa-in-f125.1e100.net:5223
	imagent         mycomputer.foo.com:59339->bos-m015c-new-rdr2.blue.aol.com:443
	 Google         mycomputer.foo.com:58776->qc-in-f125.1e100.net:5222
	 Google         mycomputer.foo.com:60731->qa-in-f125.1e100.net:5222
	 Google         mycomputer.foo.com:60858->qc-in-f125.1e100.net:5222
	 Google         mycomputer.foo.com:60982->qc-in-f125.1e10

0
2013-04-03 02:04:11

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