FIPLAB Ltd has Memory Clean in the Mac App Store for FREE for limited time.

Memory Clean is the ultimate app for optimizing your Mac’s memory and is best used after you have finished using a memory (RAM) intensive app or game. You also get your Mac’s full memory stats neatly displayed through your menu bar.

With the slickest interface and user experience, Memory Clean stands head and shoulders above the rest.

Note: Memory Clean works by purging the Mac’s inactive memory and is best used when you close an intensive app that you do not plan to use again quickly within a few hours.