Software that is not developed by the Inochi2D project but may be used in conjunction with it.
Mannequin is a character generator developed initially for video games. The developer AR14 added support for exporting Inochi2D models (.inp) for use in Inochi Session. The free version also allows .inp export.
The developer released a tutorial video explaining how to use Inochi2D exported models from Mannequin with Inochi Session.
Puppetstring is a software to use alongside Inochi Session as a facetracker. It's main use is the webcam tracker but it may also be used for:
A simple Python GUI that sends VMC data to make toggles easier in Inochi Session. LilyPanel Setup Guide