Sound recorder is a great little app that records sound. You can easily record sound by pressing the mic button or the "Start recording" button. All recordings are automatically saved as soon as you stop recording and you can view them by pressing the Recordgins button. There you can play your recordings or remove them from your Recording list.
Note: If you want to export the recordings from your device to your PC, they are located under the /sdcard/SoundRecorder/ folder.