diff --git a/extra/ls/authors.txt b/extra/ls/authors.txt
new file mode 100644
index 0000000000..7c1b2f2279
--- /dev/null
+++ b/extra/ls/authors.txt
@@ -0,0 +1 @@
+Doug Coleman
diff --git a/extra/ls/ls-tests.factor b/extra/ls/ls-tests.factor
new file mode 100644
index 0000000000..b1c1f18472
--- /dev/null
+++ b/extra/ls/ls-tests.factor
@@ -0,0 +1,6 @@
+! Copyright (C) 2008 Your name.
+! See http://factorcode.org/license.txt for BSD license.
+USING: tools.test ls strings kernel ;
+IN: ls.tests
+
+[ ] [ "" ls drop ] unit-test
diff --git a/extra/ls/ls.factor b/extra/ls/ls.factor
new file mode 100644
index 0000000000..3e21873fec
--- /dev/null
+++ b/extra/ls/ls.factor
@@ -0,0 +1,63 @@
+! Copyright (C) 2008 Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
+USING: accessors arrays assocs combinators generalizations
+io.files io.unix.files math.parser sequences.lib calendar math
+kernel sequences unix.groups unix.users combinators.cleave
+strings combinators.short-circuit unicode.case ;
+IN: ls
+
+TUPLE: ls-info path user group size ;
+
+: ls-time ( timestamp -- string )
+    [ hour>> ] [ minute>> ] bi
+    [ number>string 2 CHAR: 0 pad-left ] bi@ ":" splice ;
+
+: ls-timestamp ( timestamp -- string )
+    [ month>> month-abbreviation ]
+    [ day>> number>string 2 CHAR: \s pad-left ]
+    [
+        dup year>> dup now year>> =
+        [ drop ls-time ] [ nip number>string ] if
+        5 CHAR: \s pad-left
+    ] tri 3array " " join ;
+
+: read>string ( ? -- string ) "r" "-" ? ; inline
+
+: write>string ( ? -- string ) "w" "-" ? ; inline
+
+: execute-string ( str bools -- str' )
+    swap {
+        { { t t } [ >lower ] }
+        { { t f } [ >upper ] }
+        { { f t } [ drop "x" ] }
+        [ 2drop "-" ]
+    } case ;
+
+: permissions-string ( permissions -- str )
+    {
+        [ type>> file-type>ch 1string ]
+        [ user-read? read>string ]
+        [ user-write? write>string ]
+        [ [ uid? ] [ user-execute? ] bi 2array "s" execute-string ]      
+        [ group-read? read>string ]
+        [ group-write? write>string ]
+        [ [ gid? ] [ group-execute? ] bi 2array "s" execute-string ]      
+        [ other-read? read>string ]
+        [ other-write? write>string ]
+        [ [ sticky? ] [ other-execute? ] bi 2array "t" execute-string ]      
+    } <arr> concat ;
+
+: ls ( path -- lines )
+    [ [ [
+        "" directory-files [
+            dup file-info
+            {
+                [ permissions-string ]
+                [ nlink>> number>string 3 CHAR: \s pad-left ]
+                ! [ uid>> ]
+                ! [ gid>> ]
+                [ size>> number>string 15 CHAR: \s pad-left ]
+                [ modified>> ls-timestamp ]
+            } <arr> swap suffix " " join
+        ] map
+    ] with-group-cache ] with-user-cache ] with-directory ;
diff --git a/extra/ls/tags.txt b/extra/ls/tags.txt
new file mode 100644
index 0000000000..6bf68304bb
--- /dev/null
+++ b/extra/ls/tags.txt
@@ -0,0 +1 @@
+unportable