diff --git a/mdoc2man.awk b/mdoc2man.awk
new file mode 100644
index 0000000..856e2d7
--- /dev/null
+++ b/mdoc2man.awk
@@ -0,0 +1,340 @@
+#!/usr/bin/awk
+#
+# Version history:
+#  v3, I put the program under a proper license
+#      Dan Nelson <dnelson@allantgroup.com> added .An, .Aq and fixed a typo
+#  v2, fixed to work on GNU awk --posix and MacOS X
+#  v1, first attempt, didn't work on MacOS X
+#
+# Copyright (c) 2003 Peter Stuge <stuge-mdoc2man@cdy.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+
+BEGIN {
+  optlist=0
+  oldoptlist=0
+  nospace=0
+  synopsis=0
+  reference=0
+  block=0
+  ext=0
+  extopt=0
+  literal=0
+  prenl=0
+  line=""
+}
+
+function wtail() {
+  retval=""
+  while(w<nwords) {
+    if(length(retval))
+      retval=retval OFS
+    retval=retval words[++w]
+  }
+  return retval
+}
+
+function add(str) {
+  for(;prenl;prenl--)
+    line=line "\n"
+  line=line str
+}
+
+! /^\./ {
+  for(;prenl;prenl--)
+    print ""
+  print
+  if(literal)
+    print ".br"
+  next
+}
+
+/^\.\\"/ { next }
+
+{
+  option=0
+  parens=0
+  angles=0
+  sub("^\\.","")
+  nwords=split($0,words)
+  for(w=1;w<=nwords;w++) {
+    skip=0
+    if(match(words[w],"^Li|Pf$")) {
+      skip=1
+    } else if(match(words[w],"^Xo$")) {
+      skip=1
+      ext=1
+      if(length(line)&&!(match(line," $")||prenl))
+        add(OFS)
+    } else if(match(words[w],"^Xc$")) {
+      skip=1
+      ext=0
+      if(!extopt)
+        prenl++
+      w=nwords
+    } else if(match(words[w],"^Bd$")) {
+      skip=1
+      if(match(words[w+1],"-literal")) {
+        literal=1
+        prenl++
+        w=nwords
+      }
+    } else if(match(words[w],"^Ed$")) {
+      skip=1
+      literal=0
+    } else if(match(words[w],"^Ns$")) {
+      skip=1
+      if(!nospace)
+        nospace=1
+      sub(" $","",line)
+    } else if(match(words[w],"^No$")) {
+      skip=1
+      sub(" $","",line)
+      add(words[++w])
+    } else if(match(words[w],"^Dq$")) {
+      skip=1
+      add("``")
+      add(words[++w])
+      while(w<nwords&&!match(words[w+1],"^[\\.,]"))
+        add(OFS words[++w])
+      add("''")
+      if(!nospace&&match(words[w+1],"^[\\.,]"))
+        nospace=1
+    } else if(match(words[w],"^Sq|Ql$")) {
+      skip=1
+      add("`" words[++w] "'")
+      if(!nospace&&match(words[w+1],"^[\\.,]"))
+        nospace=1
+    } else if(match(words[w],"^Oo$")) {
+      skip=1
+      extopt=1
+      if(!nospace)
+        nospace=1
+      add("[")
+    } else if(match(words[w],"^Oc$")) {
+      skip=1
+      extopt=0
+      add("]")
+    }
+    if(!skip) {
+      if(!nospace&&length(line)&&!(match(line," $")||prenl))
+        add(OFS)
+      if(nospace==1)
+        nospace=0
+    }
+    if(match(words[w],"^Dd$")) {
+      date=wtail()
+      next
+    } else if(match(words[w],"^Dt$")) {
+      id=wtail()
+      next
+    } else if(match(words[w],"^Os$")) {
+      add(".TH " id " \"" date "\" \"" wtail() "\"")
+    } else if(match(words[w],"^Sh$")) {
+      add(".SH")
+      synopsis=match(words[w+1],"SYNOPSIS")
+    } else if(match(words[w],"^Xr$")) {
+      add("\\fB" words[++w] "\\fP(" words[++w] ")" words[++w])
+    } else if(match(words[w],"^Rs$")) {
+      split("",refauthors)
+      nrefauthors=0
+      reftitle=""
+      refissue=""
+      refdate=""
+      refopt=""
+      reference=1
+      next
+    } else if(match(words[w],"^Re$")) {
+      prenl++
+      for(i=nrefauthors-1;i>0;i--) {
+        add(refauthors[i])
+        if(i>1)
+          add(", ")
+      }
+      if(nrefauthors>1)
+        add(" and ")
+      add(refauthors[0] ", \\fI" reftitle "\\fP")
+      if(length(refissue))
+        add(", " refissue)
+      if(length(refdate))
+        add(", " refdate)
+      if(length(refopt))
+        add(", " refopt)
+      add(".")
+      reference=0
+    } else if(reference) {
+      if(match(words[w],"^%A$")) { refauthors[nrefauthors++]=wtail() }
+      if(match(words[w],"^%T$")) {
+        reftitle=wtail()
+        sub("^\"","",reftitle)
+        sub("\"$","",reftitle)
+      }
+      if(match(words[w],"^%N$")) { refissue=wtail() }
+      if(match(words[w],"^%D$")) { refdate=wtail() }
+      if(match(words[w],"^%O$")) { refopt=wtail() }
+    } else if(match(words[w],"^Nm$")) {
+      if(synopsis) {
+        add(".br")
+        prenl++
+      }
+      n=words[++w]
+      if(!length(name))
+        name=n
+      if(!length(n))
+        n=name
+      add("\\fB" n "\\fP")
+      if(!nospace&&match(words[w+1],"^[\\.,]"))
+        nospace=1
+    } else if(match(words[w],"^Nd$")) {
+      add("\\- " wtail())
+    } else if(match(words[w],"^Fl$")) {
+      add("\\fB\\-" words[++w] "\\fP")
+      if(!nospace&&match(words[w+1],"^[\\.,]"))
+        nospace=1
+    } else if(match(words[w],"^Ar$")) {
+      add("\\fI")
+      if(w==nwords)
+        add("file ...\\fP")
+      else {
+        add(words[++w] "\\fP")
+        while(match(words[w+1],"^\\|$"))
+          add(OFS words[++w] " \\fI" words[++w] "\\fP")
+      }
+      if(!nospace&&match(words[w+1],"^[\\.,]"))
+        nospace=1
+    } else if(match(words[w],"^Cm$")) {
+      add("\\fB" words[++w] "\\fP")
+      while(w<nwords&&match(words[w+1],"^[\\.,:;)]"))
+        add(words[++w])
+    } else if(match(words[w],"^Op$")) {
+      option=1
+      if(!nospace)
+        nospace=1
+      add("[")
+    } else if(match(words[w],"^Pp$")) {
+      prenl++
+    } else if(match(words[w],"^An$")) {
+      prenl++
+    } else if(match(words[w],"^Ss$")) {
+      add(".SS")
+    } else if(match(words[w],"^Pa$")&&!option) {
+      add("\\fI")
+      w++
+      if(match(words[w],"^\\."))
+        add("\\&")
+      add(words[w] "\\fP")
+      while(w<nwords&&match(words[w+1],"^[\\.,:;)]"))
+        add(words[++w])
+    } else if(match(words[w],"^Dv$")) {
+      add(".BR")
+    } else if(match(words[w],"^Em|Ev$")) {
+      add(".IR")
+    } else if(match(words[w],"^Pq$")) {
+      add("(")
+      nospace=1
+      parens=1
+    } else if(match(words[w],"^Aq$")) {
+      add("<")
+      nospace=1
+      angles=1
+    } else if(match(words[w],"^S[xy]$")) {
+      add(".B " wtail())
+    } else if(match(words[w],"^Ic$")) {
+      plain=1
+      add("\\fB")
+      while(w<nwords) {
+        w++
+        if(match(words[w],"^Op$")) {
+          w++
+          add("[")
+          words[nwords]=words[nwords] "]"
+        }
+        if(match(words[w],"^Ar$")) {
+          add("\\fI" words[++w] "\\fP")
+        } else if(match(words[w],"^[\\.,]")) {
+          sub(" $","",line)
+          if(plain) {
+            add("\\fP")
+            plain=0
+          }
+          add(words[w])
+        } else {
+          if(!plain) {
+            add("\\fB")
+            plain=1
+          }
+          add(words[w])
+        }
+        if(!nospace)
+          add(OFS)
+      }
+      sub(" $","",line)
+      if(plain)
+        add("\\fP")
+    } else if(match(words[w],"^Bl$")) {
+      oldoptlist=optlist
+      if(match(words[w+1],"-bullet"))
+        optlist=1
+      else if(match(words[w+1],"-enum")) {
+        optlist=2
+        enum=0
+      } else if(match(words[w+1],"-tag"))
+        optlist=3
+      else if(match(words[w+1],"-item"))
+        optlist=4
+      else if(match(words[w+1],"-bullet"))
+        optlist=1
+      w=nwords
+    } else if(match(words[w],"^El$")) {
+      optlist=oldoptlist
+    } else if(match(words[w],"^It$")&&optlist) {
+      if(optlist==1)
+        add(".IP \\(bu")
+      else if(optlist==2)
+        add(".IP " ++enum ".")
+      else if(optlist==3) {
+        add(".TP")
+        prenl++
+        if(match(words[w+1],"^Pa|Ev$")) {
+          add(".B")
+          w++
+        }
+      } else if(optlist==4)
+        add(".IP")
+    } else if(match(words[w],"^Sm$")) {
+      if(match(words[w+1],"off"))
+        nospace=2
+      else if(match(words[w+1],"on"))
+        nospace=0
+      w++
+    } else if(!skip) {
+      add(words[w])
+    }
+  }
+  if(match(line,"^\\.[^a-zA-Z]"))
+    sub("^\\.","",line)
+  if(parens)
+    add(")")
+  if(angles)
+    add(">")
+  if(option)
+    add("]")
+  if(ext&&!extopt&&!match(line," $"))
+    add(OFS)
+  if(!ext&&!extopt&&length(line)) {
+    print line
+    prenl=0
+    line=""
+  }
+}