Is there one that uses Huffman compression? Or is that just another name for LZW?
roll your own if you have a mind to.
Like Microsoft with the old *.??_ files on most of their DMF media. I think the most annoying thing about the old (<DOS 6.22) EXPAND tool was that it didn't support wildcards (newer versions did, I believe), which meant if you needed to install something manually... it was a pain. But we all know microsoft- most of the time, rather then buy a license or something for most things- they just buy the company, and thus own the product.
And- Of course, a lot of the different implementations can/do use the same algorithms and simply have different file formats. The interesting thing is to say, Zip something, then RAR that ZIP, etc... and continue using different archivers to see how small it will get... which is generally when the space saved with each subsequent compression is less then the space overhead for the format itself.
Why? It amuses me.