The Pliant language, and the FullPliant operating system, are free software of which I am the author, and which I have been making available for 25 years.
Pliant is classic computing, but well constructed, that is to say with a lot of thought on the concepts, and as a result less than 200,000 lines of code for the whole, where standard computing is has become a completely crazy pile-up, including in the case of free software.
But Pliant also shows that the distribution, including of free computer software, is much more a matter of marketing than of technical merit, which I have clearly ignored.The key concept of Pliant is non-syntactic meta-programming.