Quite a few small models, not many large models (which are not gigantic frontier models either for the record).
The datasets used are all public domain or expired copyrights, like Common Corpus and Common Pile. There are also models like Talkie that are exclusively based on data from prior to 1930.
So you've got the Pleias Common Models, Comma (EleutherAI and people on Huggingface contributing), KL3M (Kelvin Legal Large Language Model), Apertus (ETH Zurich), and OLMo/v2 (Open Language Model, Allen Institute for AI) as good prime examples.
@Osm@lemmy.ml for your reference