OpenVoiceOS is part of a larger ecosystem of FOSS voice technology, we work closely with the following projects
HiveMind is a community-developed superset or extension of OpenVoiceOS
With HiveMind, you can extend one (or more, but usually just one!) instance of Mycroft to as many devices as you want, including devices that can't ordinarily run Mycroft!
HiveMind's developers have successfully connected to Mycroft from a PinePhone, a 2009 MacBook, and a Raspberry Pi 0, among other devices. Mycroft itself usually runs on our desktop computers or our home servers, but you can use any Mycroft-branded device, or OpenVoiceOS, as your central unit.
Plasma Bigscreen integrates and uses OpenVoiceOS as voice framework stack to serve voice queries and voice applications (skills with a homescreen), one can easily enable mycroft / ovos integration in the bigscreen launcher by installing ovos core and required services and enabling the integration switch in the bigscreen KCM
Neon was one the first projects ever to adopt ovos-core as a library to build their own voice assistant, Neon works closely together with OVOS and both projects are mostly intercompatible
Mycroft AI started it all, it was one of the first ever FOSS voice assistants and is the project OVOS descends from.
Most applications made for mycroft will work in OVOS and vice-versa
Secret Sauce AI
Secret Sauce AI is a coordinated community of tech minded AI enthusiasts working together on projects to identify blockers and improve the basic open source tools and pipeline components in the AI (voice) assistant pipeline (wakeword, ASR, NLU, NLG, TTS). The focus is mostly geared toward deployment on edge devices and self hosted solutions. This is not a voice assistant project in and of itself, rather Secret Sauce AI helps AI (voice) assistant projects come together as individuals and solve basic problems faced by the entire community.