memturbo
I read what it does, and I don't think you'd notice any difference between running this application and just re-booting. The main problem with applications (not just for windows, but in general), is depending on how they are coded (written/designed, etc... ), they may not give memory or resources back when you shut them down (this is known as a memory leak).
Here's another program which does all of the above plus a lot more, and it's free:
here's the link to read about it/download it...
http://www.pcmag.com/article/0,2997,s%3D1478%26a%3D13909,00.asp
Here's a real watered down explanation on this memory situation:
Basically, a memory leak is a condition in which a program (say Word) demands some memory from the OS (say windows). When you are finished using word, you shut it down. At this point, word is supposed to free (give back) the memory it was using so something else can use it. Sometimes it doesn't. So, now word is not running, but the memory is still "checked out". Almost all programs suffer from this, some more than others. Contrary to popular belief, most of the micro$oft applications manage memory quite well, perhaps because some of the operating systems (os's) they run on (windows95/98) manage memory so poorly

.
Now here's what I consider even more important for ya'll to understand. .
System Resources!!
Adding ram has NO (read 0) effect on system resource usage. System resources are pre-defined amounts of memory set aside for 5 basic underlying processes. There is mainly 1 you can control, that is the GDI process, or the process which monitors/controls everything you see. The GDI process doesn't keep that pretty picture on your desktop in memory, it just keeps track of WHAT pretty picture you have on your desktop. If you have 50 icons on your desktop, it is keeping track of all 50. Other things it "keeps track of" are what fonts you have loaded, what cursor you use, etc... . All of this stuff is necessary to keep track of, but you can reduce it's workload by "cleaning up" the desktop. Another process (not the GDI), keeps track of all the programs you have running in the taskbar (all those icons over on the bottom right by the clock). If you have applications running in there which don't need to be running, turn them off. Two of the biggest resource hogs I've seen are Comet Cursor and Weatherbug. You can usually kill these programs by right-clicking on them and going through the menu, looking for something to uncheck like 'start automatically', etc...
What ram WILL help you with...
For an analogy, we can say that "system resources" are your filing system and your address book. Your hard drive is your filing cabinet. RAM is how much deskspace you have. Virtual memory is "temp" folder in your filing cabinet.
The more ram you have, the more junk you have on your desk at a time. Now the faster the processor you have (read brain), the faster you can switch between one thing on your desk and another. However, once you have used up all your deskspace (ram), you have to take something off of your desk and put it in a temporary spot until you are ready to get back to it (put it back on your desk/back into ram) or file it away (put it back in the filing cabinet/hard drive).
This also gives an admittedly bad example of why tons of ram really won't help you that much (if you are using windows 95/98/me). Going from a school desk to an executive desk would really help out (say going from 32mb ram to 128 or even 256). However, going from an executive desk to say a desk the size of a basketball court could actually slow you down. That's because you can't manage all of this space, and you would spend half your time getting up and walking to the other side of your desk to get something. This is the problem the windows 95/98/me family has, it is a poor manager of ram. Now windows nt/2000/xp (all basically versions of windows nt) are all pretty good managers of ram, and the more you give them the happier they are.