iroiro & iroiro2
By bizz. A plugin that can do many things, like convert and mass edit lyrics.
By nmasao. For regenerating frq files.
By Delta. Automates turning CV notes into CVVC notes.
Extended Pitch Editor
Extended Envelope Editor
By Canon. Automatically tunes the UST.
By Ackie Sound. Reads VocalShifter project / WAV file and applies the pitch.
By oatsu. NNSVS ported to UTAU as a plugin.
By oatsu-gh. Transfers an ENUNU model's pitch to UTAU.
By KLAD. Changes
ん to match the next note. (n, ng, m variants)