The ram booster simply writes your ram to the page file which can speed it up or slow down depending on the task you will do after. Running a new program would be fast because the free ram but one that was already open might be slow because it is on the page file. I don't recommend using memory optimizers. They put extra uneeded stress on your harddrive by dumping into the page file.
Clean clutter- That can be good as long as it's safe. Some cleaners search by extension and could delete some files you don't want it to.
Harddisk speedup may be a defrager which is a great way to speed up your system. It reoganizes your data in a logical way for faster access.
Windows Optimization- I can't really figure this one out. It could be a number of things.
If the tool works -cool. I wouldn't trust it though. It is not from any reputable company.