After a half a century or so without, BCPL recently got floats (for a flight simulator): https://www.cl.cam.ac.uk/~mr10/BCPL.html
I prefer the author's MCPL: https://www.cl.cam.ac.uk/~mr10/MCPL.html but have no idea if anyone is currently using it.
[Edit: looks like Martin backported pattern matching from MCPL into BCPL ca. Oct 2022, so that's recent signs of life for both strains!]