Recommendation for a system information tool

Hi,

I was wondering if there was any tool that can give me complete system
information for machine in linux (running OpenSuse 10). On windows I
use the Everest home edition from Lavasys. Is there an equivalent in
Linux?

Actually lava sys discontinued development on the free edition of
Everest so any new tool that people can recommend for use in
windows(xp + vista) would be great as well. (if it also works in linux
that would be fantastic)

Basically a tool that can give me detailed hardware and device
information. If it can also do performance profiling and bench
marking, it would be great.

Any help is much appreciated.