iSing Karaoke - iSing Karaoke is free to use the Karaoke app that offers free access to hundreds of songs.
TAL-Vocoder - Vintage vocoder emulation plugin in VST and Audio Unit format.
Singa - Singa is the best way to sing karaoke on mobile or tablet.
ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
Sing! Karaoke by Smule - Karaoke with your favorite celebrity singers
Voloco - Auto-tune made simple and funny for everyone