There are several free programs available for download from this site. They are organized by operating system:
DOS and Windows Freeware
DOS and Windows programs, including programs for Windows NT, 2000, and maybe even XP.
Free software for the Apple Macintosh.
I haven't used Linux for a while, and as a result haven't needed any software for it for a long, long time. You might take a look at the Tucows Linux Home and see what they have there.
Freeware programs written by the doofy bozo who maintains this site. These are mainly simple tools to help in systems administration tasks, but there are a couple HTML-related things, too. Don't expect much, though... I'm not a real programmer.