Don't know about any special unknown and super-secret software that does it, but here is an example of an RTMP link that plays directly in VLC (tested with VLC media player 2.1.0-git-20120407-0006 Rincewind)
Code:
rtmp://shanttv.cdnvideo.ru:80/shanttv-live/shanttv.sdp
RTMP link for RtmpDump (+ VLC):
Code:
rtmpdump -r "rtmp://shanttv.cdnvideo.ru:80/shanttv-live" -a "shanttv-live" -f "WIN 10,3,183,7" -W "http://www.haykakantv.com/rad/shanttv/flowplayer-3.2.5.swf" -p "http://www.haykakantv.com/rad/shanttv/" --live -y "shanttv.sdp" --quiet | vlc.exe -
where vlc.exe needs the path provided.