There are many free tools which claim to free up RAM in Windows, but we cannot actually say whether these apps really do the job. Rizone Memory Booster is another freeware application which can free up RAM in Windows, but unlike other tools it does not run on the placebo memory optimization engine and will not force any memory out of your ram. It will however make a Windows API call that tells Windows to clean up the workspace of all processes thus freeing up any memory, processes no longer needs (Clear Processes Working Set).
This app will not be able to free up a big amount of RAM, but instead will improve the stability and performance of your computer. This will also cure memory leaks and in some cases has been able to unfreeze programs.
You can do automatic intelligent optimization or manually do the task, these settings can be changed from the options window.