A user asked for "other usage monitors" (basically, other than the CPU monitor). The original post can be found here : https://sourceforge.net/tracker/?func=detail&aid=3009603&group_id=180858&atid=894872
I have written a plugin that handles two different monitors (CPU & RAM). It should be easy to add other monitors later (one would only have to write the function that fetches data used to draw the graph). I hope this is useful. There is only one small bug left : a white border is sometimes drawn around monitors, but it should be really easy to fix for someone used to GTK.