Most of these utilities do absolutely nothing to improve performance, read "placebo effect". The only way to really improve performance is with new/better hardware, the only way to get more ram is by buying more ram.
Most of the time these applications will disable key features of the operating system that could cause it to become unstable and crash, in other instances it could worsen performance rather than helping it.
Since this is technically considered spam in a sense, is deceiving and misleading I am closing this thread.