diff --git a/mods/format.elv b/mods/format.elv
index ffebb78..3d033ac 100644
--- a/mods/format.elv
+++ b/mods/format.elv
@@ -2,6 +2,9 @@ use math
 use re
 use str
 use ./common
+use ./list
+use ./map
+use ./num
 
 fn chars {|v|
   str:split '' $v
@@ -150,7 +153,8 @@ fn line {|&sep=' ' props line|
   str:join $sep $data
 }
 
-fn list {|&with-header=$true &csep=' ' &hsep='-' &recompute=$true props data|
+fn list {|&with-header=$true &csep=' ' &hsep='-' &recompute=$true props @data|
+  set data = (common:to-list $data)
   if $recompute {
     set props = (update-props $props $data)
   }
@@ -196,3 +200,22 @@ fn size {|size|
     printf '%.1f%s' $e $m[$u]
   }
 }
+
+fn tabulate {|&cols=[] &sep=' ' @lines|
+  var cs    = (count $cols)
+  var @data = (eawk {|_ @parts|
+    var ps   = (count $parts)
+    var diff = (- $cs $ps)
+    if (< $diff 0) {
+      use builtin
+      set @cols = $@cols (builtin:repeat (num:neg $diff) [&size=0])
+      set cs    = $ps
+    }
+    map:to-map $parts
+  } (common:to-list $@lines))
+  set @cols = (list:foreach {|i c|
+    var a = (common:cexec (has-key $c align) { put $c[align] } left)
+    column &align=$a $i
+  } $cols)
+  list &csep=$sep &with-header=$false $cols $@data
+}