Trisquel (full name Trisquel GNU/Linux) is a computer operating system, a Linux distribution, derived from another distribution, Ubuntu. The project aims for a fully free software system without proprietary software or firmware and uses a version of Ubuntu’s modified kernel, with the non-free code (binary blobs) removed. Trisquel relies on user donations. Its logo is a triskelion, a Celtic symbol. Trisquel is listed by the Free Software Foundation as a distribution that contains only free software.
I tested it in a viartual box and it seemed very trade-free. The only thing I found was the default search engine in the browser of Trisquel which is Duckduckgo. Duckduckgo is not trade-free since they put ads in their search (https://www.trade-free.org/directory/rejected/duckduckgo/). I’d recommend them to use one of the SearX Instances (https://www.trade-free.org/directory/?s=searx+instance). Maybe I’ll contact them about that.