Very timely; I found out yesterday that the UPX program (EXE specific compressor from many years ago) was made by the same guys who made LZO. I had this realization that there is a progeny from people who write compression stuff. In a similar vein, The Rob Pike post from yesterday mentioned Ken Thompson had made a custom audio compression for the Plan 9 release. He also made the UTF-8 compressor too. I love seeing how these people keep refining the state of the art.