eBoostr 

At one point or another, everyone resorts to a system optimizer in order to improve the performance of their computer. eBoostr was designed to offer a different solution for boosting the speed of the PC.

The way eBoostr works is basically pretty simple. It uses a part of your RAM to build a cache, which provides quicker execution speed for the applications that you frequently use. The good part is that you are able to determine how much RAM the application can use, thus, deciding how large your cache should be. But, if you are not familiar with this kind of software, the program can automatically allot itself the RAM space that it requires.

In my opinion, one of the best features this program has to offer is that it allows you to create a priority list. This means that you will be able to actually select which of your applications will be added to the cache file and receive a boost. Furthermore, eBoostr embeds a speed checker that displays the access speed of your system before and after the optimization.

Personally, I recommend eBoostr to people who want to optimize their PCs, but only if they have at least 2 GB of RAM. If you have less, the money you spend on the program will probably not be worth the end result as it will not have enough space to build a viable cache.