Packages 
Package Description
com.tomgibara.crinch.hashing  
eu.bengreen.data.utility  
org.rrd4j
RRD4J is a high performance data logging and graphing system for time series data, implementing RRDTool's functionality in Java.
org.rrd4j.converter
RRDTool to RRD4J RRD files conversion.
org.rrd4j.core
core RRD4J implementation.
org.rrd4j.core.jrrd
This package provides read-only access to natives RRD file.
org.rrd4j.core.timespec  
org.rrd4j.data
RRD4J data management.
org.rrd4j.demo  
org.rrd4j.graph
RRD4J graph capabilities.
org.rrd4j.inspector
RRD4J RRD files inspector GUI.