Try Swapper2 - newer version for Android 1.6 and up.
Swapper is Android 1.5 only.
"Extending memory" for non active applications (like music player + browser + maps + etc.).
Requires root and SD/SDHC card.
Warning: Swapper can shorten SD card lifespan.
Tags: swapper for root uptodown , baixar swapper for root apk via uptodown