repomirror is a tool to create local mirrors (partial or complete) of Linux distributions and repositories. It currently support Debian derivatives (both apt and simple repositories) and yum repositories. It has been tested with Debian, Fedora, CentOS, openSUSE, and OpenWrt feeds. It is also able to build repositories for local packages, although currently in a very limited fashion.
rrdUtils is a set of tools intended to help creation and graphing of RRD files. It is based on plain text configuration files where the RRD files are described (datasources, intervals, etc.) along with the nodes which the RRD applies to. It includes a command to create a set of similar RRDs, and another to graph them in some medium-weight elaborate ways.
Stats Collector is a set of tools intended to get statistical values from remote nodes. This covers standard server metrics as well as any other numerical value that might be useful, such as the number of running processes or users. It is constructed using a distributed agent-manager model, and uses RRDtool as data backend and to provide visualization capabilities.