hman: a bash function for Mac OS X which lets you view a man page as a nicely formatted HTML page in your browser. Source this file in your ~/.bash_profile (e.g., add a line like "source ~/hman.sh" to that file) and re-open your Terminal. Use as in "hman bash". Tested on Mac OS X 10.8.3. Requires a newer version of "groff" than comes with the OS…

hman.sh

#!/usr/bin/env bash

hman () {
  local TMPHTML=`mktemp /tmp/hman_XXXXXXXX`.html
  
  groff -mandoc -Txhtml -P'-D/tmp' `man -w $@` | \
  tidy -ashtml 2>/dev/null | \
  sed -e 's/<\/style>/body {font-family: "Helvetica Neue", Helvetica, sans-serif; width: 800px; margin-left: auto; margin-right: auto;}\
       .toc {position: fixed; overflow-y: scroll; overflow-x: hidden; top: 10px; height: 90%; width: 200px; text-transform: lowercase; margin-left: -200px; margin-top: 1.5em; font-size: 11pt; border-right: 1px solid black; }\
       .toc a { line-height: 2em; }\
       .toc p { margin-top: 0em; }\
       .content { font-size: 10pt; margin-left: 50px; }\
       h1 { font-weight: 300; font-size: 64px; margin-top: 0em; letter-spacing: -2px; }\
       h2 { margin-top: 2.5em; font-weight: 300;} \
       p { line-height: 1.25em; margin-top: 1.2em; }\
       h2 + p { margin-top: 0em !important; }<\/style>/' \
-e 's/<p><a href="#heading1">/<div class="toc">\
<p><a href="#heading1">/' \
-e 's/<hr>/<\/div>/' \
-e 's/<h2 id="heading1">/<div class="content">\
<h2 id="heading1">/' > "$TMPHTML"

open "$TMPHTML"
}