Yes, there are some free AI writing tools available. However, these are typically limited in features compared to their paid counterparts. One example is AI Writer, which offers a basic version of its services for free. There's also OpenAI's GPT-based tools, but starting from GPT-3, they have mostly been monetized for extensive use. You could also look into AI21 Labs' product, "Jupiter", which had a free tier as of my knowledge cutoff in September 2021.