This is an interesting idea.
There are plenty of programs that will show you which processes are running. There are plenty of web sites that have databases of process names and which will give a general description of what that process does and whether or not it's harmful or beneficial.
I do this a lot: See an unfamiliar process running, or an unfamiliar item in the "Run" section of the registry, then I google that name and see what folks on the net have to say about it.
It'd be nice to combine those into one program that lets you see all the running processes and looks up their names in the database, all in one window.
Perhaps some of those popular "System cleaner" or "System optimizer" utilities already do this?