Transmeta Crusoe
en.wikipedia.org
en.wikipedia.org
I still kinda wish they'd done something other than x86-32 support for their VLIW chips.
In principle, I see no reason that they couldn't have supported Motorola 68000, for instance. Even that (not 68030 or 68040, just 68000) would have been of considerable interest to hundreds of thousands of Commodore Amiga and Atari ST fans and users, enabling them to run their old OSes and apps at speeds equivalent to a 68000 at 500-600MHz or more.
(I am intentionally excluding Apple as the company was and is alive and well and would not only not have permitted classic MacOS 8.1 to run, but it offered PowerPC versions on hardware in that class of performance.)
Alpha Micro might have been interested for AMOS, too.
Now, 2 decades later, that is possible with FPGA hardware, but it wasn't then.