dhelp 0.6.18ubuntu1 (i386 binary) in ubuntu lucid

 Read all documentation with a WWW browser. dhelp builds a
 index of all installed HTML documentation. You don't need
 a WWW server to read the documentation. dhelp offers a
 very fast search in the HTML documents.
 .
 You can access the online help system with the dhelp
 program or with your browser. The URL to point your
 browser at is http://localhost/doc/HTML/index.html
 if you have a WWW server installed or
 file://localhost/usr/share/doc/HTML/index.html if not.