| Analog Synthesis | Salk (Loomis et al. 1983) |
|---|---|
| Gloss-Based/Concatenative | VCom3D (Wideman 1999)
Simon the Signer (Elliot et al. 2000) Hitachi (Ohki et al. 1994) |
| Articulatory | Sister Mary O'Net (Messing and Stern 1997)
SignSynth ViSiCAST (Elliot et al. 2000) |