OpenNMS (www.opennms.org) is free.. Haven't used it in a while but I've 
been wanting to try it again.  Don't know of any other free ones.

>I'm looking for a free SNMPtrap monitoring system
>
>I'm already collecting the traps with a standard linux.
>
>I want
>
>1) Some sort of logparser which sends me an email when something serious
>is wrong
>Or
>2) NMS system which does the same as 1 but in with GUI (webbased) etc
>
>I know HP Openview does all that but I'm looking for something free.
>
>J.
>
>--
>Jonathan De Graeve
>Network/System Administrator
>Imelda vzw
>Informatica Dienst
>015/50.52.98
>Jonathan dot de dot graeve at imelda dot be
>
>
>
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