GPT4All
Chat with local models and selected documents on your own device.

Overview
GPT4All runs supported language models locally and offers LocalDocs for document-assisted conversations. Install the appropriate desktop release, download a compatible model and explicitly select document folders. Performance depends on model size and available RAM.
Local AI · Documents · Desktop
Install for free from the official publisher
Original source & installation instructions
The application is free; downloaded models have their own licenses and storage requirements. Nomic cloud products are separate.