This is a very useful pack that contains almost every widget that you will probably ever need.
Moxx Pack Features.
Battery Charge+Status Meter
CPU and RAM meter
Time and Date
Notes and To Do list - Very Sleek & Cool
And a Slideshow picture Viewer
Also features a Winamp and Weather Widget.
ADDITIONALLY these widgets are all minimizable and the black and white theme goes well with most backgrounds.
RE: installation: Read the instructions or ask a question.(It's pretty easy though)
The calendar on the right hand side is called Simplemeter v1.01
Intro to Rainmeter
Top rainmeter Apps
All in one Rainmeter pack - Moxx