20MB is quite a bit of memory on my eeepc. What advantage does Jupiter provide over laptop-mode-tools? Seems like most everything Jupiter does, so can laptop-mode-tools, without requiring an extra 20MB of memory usage.. and if Jupiter uses 20MB, how much extra memory does the mono-runtime use? Most mono programs I've used seem to require additional memory for the mono-runtime.
That number included the Mono runtime. Jupiter does a lot of things that laptop-mode-tools doesn't do like tune many kernel parameters and shift devices into a power friendly state when you unplug.
You can actually turn the Jupiter applet off, all of the hooks are outside of the applet. The applet just lets you make quick configuration changes.