Sourceforce has the source code (felt-3.05.src.tar.gz) but I couldn't find the felt executable in this download or on their website. The .src download seems to contain all C++ source code but I don't know how to compile the source into Linux given the Makefile they supply. I did try using MS Visual C++ 6.0, but it would only compile to a Win32 system. I could research this and probably figure a way to find a freeware C++ linux compiler... and then figure out the Makefile syntacts... but isn't there a download site for a Linux version of a FElt.exe file?