UTAU - UTAU or Vocal Synthesizer Tool UTAU is a voice-synthesis software developed by Ameya/Ayame and made...
Synthesizer V - Synthesizer V: at the Forefront of Singing Synth
Emvoice One - Vocal creation and arrangement tool unlike anything on the market.
Chipspeech - chipspeech is a vintage-style speech synthesizer which recreates the sound of famous 80's voice synthesis chips.
CeVIO Creative Studio - CeVIO Creative Studio is a software suite that provides you audio creation and digital signage tools.
Cadencii - Cadencii is a program that allows cross-importation of vocal MIDI, VSQ, UST, and VSQX files.