Mike Piatek-Jimenez today has released X Resource Graph 0.3.0, the latest version of his open source system monitor application for MacOS X. XRG will monitor your CPU usage, memory usage, network activity, disk activity, local weather, and stock market data. New features in version 0.3.0 include the addition of a CPU temperature graph for supported CPUs, the ability to invert the disk read or write graph, and the ability to enable/disable the graph window’s drop shadow.