X Window browsers

NCSA Mosaic

Netscape Navigator

HotJava

X Window helper apps

Images

xv (.gif/.jpeg)

Audio

showaudio (.aiff/.au/.wav)

maplay (mpeg)

Video

xanim (avi/QuickTime)

MPegplay (mpeg)

PostScript

Ghostscript

Ghostview

WAIS

freeWAIS

Creating HTML

xhtml

Serving HTML

Apache HTTPD

NCSA HTTPD