Optimus Root Memory Optimizer 1.3.1
the author of this app says:
Optimus is a Memory Optimizer for ROOT users only.
Optimus improves system performance and battery life by adjusting Android's internal memory settings.
How does it work?
Android automatically kills background processes when system memory falls below a certain threshold. Optimus changes those memory settings, causing Android to free up memory more aggresively, thereby increasing system performance and battery life.
Optimus has three different settings: Moderate, Balanced and Extreme.
Optimus is a SAFER alternative to traditional Task Killers, which are known to cause damage to the Android operating system.