The Real-time Network Grapher (RtNG) is a Java applet. RtNG plots a scrolling line-graph from a continuous feed of CSV-style data, where new data arrives periodically with a period 0.1s or greater. The data feed can be either a TCP port or a URL
AbuGraph is a freely available Java application for the layout and visualization of directed graphs. Bound to a TCP port, it supports dynamic graph creation receiving commands from a telnet console or another third party application.