Such is the case with sys-proctable (about 20 downloads in 6 months). It works on Solaris, Linux and FreeBSD. I thought more people would be interested in this one - I think it's pretty cool. On the other hand there's sys-cpu (about 25 downloads in 3 days). It only works on Solaris at the moment and doesn't do anything especially cool IMO.
I don't get it.