Looking for IT Management Opensource Software

Hi,

I'm looking for an open source IT management software (physiical and
virtualized systems, essentially Linux and HP-UX boxes)


to collect automatically :

- MAC / IP adresses /
- OS
- Network topology (switchs / routers)
- Attaching servers to projects ...

of the kind of ZenOss (http://community.zenoss.org/index.jspa) but
lighter and customizable

Has Some of you used NetDisco (http://netdisco.org/) ?

PS : please, nor Nagios nor monitoring softs like this one !!