By nwp8861. For configuring the oto.ini.
By nwp8861. For recording UTAU voicebanks.
By KLAD. Crossplatform OREMO alternative. For OSes other than Windows, you must build it from source.
By Heiden.BZR. For configuring the oto.ini.
By Custom.Maid. Software for quickly regenerating frqs.
By Delta. Automatically generates oto.ini for CVVC voicebanks. May require configuration.
By Ackie Sound. Vocal editor that can edit pitch, DYN(Dynamics), formant, pan, timing, etc.