Ever heard of the freeware program "Samurize"? It can do all that (I think) if you tweak around with all the settings. You can have it show other stuff like incoming e-mails, IP address, in/out network speeds, hard drive space, etc.
It uses VERY little memory to run and I think the website is: Samurize
It uses VERY little memory to run and I think the website is: Samurize
















But I'm sure we'll get what you meant.