MicDroid tunes your voice! Reproduce the effects you hear in music yourself! If you've been waiting for the iPhone's famous I Am T-Pain app to make it to Android, you should try out MicDroid! Always sing in tune! Offers plenty of options for pitch correction!
GStrings - a chromatic tuner for the guitar, violin, or any other instrument. This is the ad supported version of gStrings ( www.cohortor.org/gstrings ), a chromatic tuner application measuring sound pitch and intensity