Semicircular

And my second Rainmeter skin of the evening.
Shown are RAM, CPU, Battery Power and 2 HDD stats. The HDD skins can be modified pretty easily to show the drives you use, I just have Linux on C + D, plus a DVD Drive on E, that's why I have Windows on F + G and am monitoring those here.
The colours and fonts can also be edited in the skins by changing the RGB values at the top of each one.

Thanks to joaor10 for the inspiration on this.
Sorry I didn't get around to adding everything you suggested. Maybe I'll get around to those later.

*This skin requires you to have Rainmeter 0.14 April beta (this can be downloaded at [link] . If you can't see the semi-circles in this kin, but can see everything else, that's probably going to be the problem (thanks, jsmorley!).