Memory Clean
I have used various versions of the app over the past 2 years and have found it to be very efficient. I find that repeated cleaning actions can free up more memory, and I use it repeatedly if I deal with memory intensive tasks such a lot of pictures, Music downloads and playing. I have not tried the Extreme Clean, as I find the regular (and FREE) version very effective in freeing up memory. I only regret that this app does not work with my old MacBook running SnowLeopard.
Ikeram about
Memory Clean - Monitor and Free Up Memory, v6.2