RPMs on the web:
http://www.rpmfind.net
http://rpm.pbone.net/
Installing:
rpm –ivh (name)
Listing Installed Packages:
rpm –qa | grep (name) to find installed packages
Removing Packages:
rpm –e (name)
Freshen packages:
rpm –F *.rpm
Building RPM from source:
http://wiki.centos.org/HowTos/RebuildSRPM