I can't install new apps, it says that my phone memory is running low. And I can't move my apps on SD card.
I'm not sure why you can't move those files to the SD card. Maybe the sd card is full? But to uninstall apps you can't the normal way I use HiUninstaller. It requires root but it let's you uninstall any app and back it up in case you want it back. Just be careful what you uninstall with it. You can find it on the market.