diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Juicy Pixels Extra 0.2.0
+
+* Added `rotate180`, `beside`, and `below`.
+
 ## Juicy Pixels Extra 0.1.1
 
 * Added benchmarks.
diff --git a/Codec/Picture/Extra.hs b/Codec/Picture/Extra.hs
--- a/Codec/Picture/Extra.hs
+++ b/Codec/Picture/Extra.hs
@@ -1,6 +1,6 @@
 -- |
 -- Module      :  Codec.Picture.Extra
--- Copyright   :  © 2016 Mark Karpov
+-- Copyright   :  © 2016–2017 Mark Karpov
 -- License     :  BSD 3 clause
 --
 -- Maintainer  :  Mark Karpov <markkarpov@openmailbox.org>
@@ -20,12 +20,16 @@
   , flipHorizontally
   , flipVertically
   , rotateLeft90
-  , rotateRight90 )
+  , rotateRight90
+  , rotate180
+  , beside
+  , below )
 where
 
 import Codec.Picture
 import Control.Monad.ST
 import qualified Codec.Picture.Types as M
+import Data.List (foldl1')
 
 -- | Scale image using bi-linear interpolation. This is specialized to
 -- 'PixelRGB8' only for speed (polymorphic version is easily written, but
@@ -130,3 +134,49 @@
   where
     gen x y = pixelAt img y (imageHeight - 1 - x)
 {-# INLINEABLE rotateRight90 #-}
+
+-- | Rotate image by 180°, i.e flip both vertically and horizontally.
+--
+-- @since 0.2.0
+
+rotate180 :: Pixel a => Image a -> Image a
+rotate180 img@(Image w h _) = generateImage g w h
+  where
+    g x y = pixelAt img (w - 1 - x) (h - 1 - y)
+{-# INLINEABLE rotate180 #-}
+
+-- | Create an image by placing several images side by side. If the images
+-- are of differnet heights the smallest height is used.
+--
+-- @since 0.2.0
+
+beside :: Pixel a => [Image a] -> Image a
+beside = foldl1' go
+  where
+    go :: Pixel a => Image a -> Image a -> Image a
+    go img1@(Image w1 h1 _) img2@(Image w2 h2 _) =
+      generateImage g (w1 + w2) h
+      where
+        g x
+          | x < w1 = pixelAt img1 x
+          | otherwise = pixelAt img2 (x - w1)
+        h = min h1 h2
+{-# INLINEABLE beside #-}
+
+-- | Create an image by placing several images in a vertical stack. If the
+-- images are of differnet widths the smallest width is used.
+--
+-- @since 0.2.0
+
+below :: Pixel a => [Image a] -> Image a
+below = foldl1' go
+  where
+    go :: Pixel a => Image a -> Image a -> Image a
+    go img1@(Image w1 h1 _) img2@(Image w2 h2 _) =
+      generateImage g w (h1 + h2)
+      where
+        g x y
+          | y < h1 = pixelAt img1 x y
+          | otherwise = pixelAt img2 x (y - h1)
+        w = min w1 w2
+{-# INLINEABLE below #-}
diff --git a/JuicyPixels-extra.cabal b/JuicyPixels-extra.cabal
--- a/JuicyPixels-extra.cabal
+++ b/JuicyPixels-extra.cabal
@@ -1,7 +1,7 @@
 --
 -- Cabal configuration for ‘JuicyPixels-extra’ package.
 --
--- Copyright © 2016 Mark Karpov <markkarpov@openmailbox.org>
+-- Copyright © 2016–2017 Mark Karpov <markkarpov@openmailbox.org>
 --
 -- Redistribution and use in source and binary forms, with or without
 -- modification, are permitted provided that the following conditions are
@@ -31,8 +31,9 @@
 -- POSSIBILITY OF SUCH DAMAGE.
 
 name:                 JuicyPixels-extra
-version:              0.1.1
+version:              0.2.0
 cabal-version:        >= 1.10
+tested-with:          GHC==7.8.4, GHC==7.10.3, GHC==8.0.2
 license:              BSD3
 license-file:         LICENSE.md
 author:               Mark Karpov <markkarpov@openmailbox.org>
@@ -72,7 +73,7 @@
   type:               exitcode-stdio-1.0
   build-depends:      base              >= 4.7 && < 5
                     , JuicyPixels       >= 3.2.6.4 && < 3.3
-                    , JuicyPixels-extra >= 0.1.1
+                    , JuicyPixels-extra
                     , hspec             >= 2.0
   other-modules:      Codec.Picture.ExtraSpec
   if flag(dev)
@@ -87,10 +88,10 @@
   type:               exitcode-stdio-1.0
   build-depends:      base              >= 4.7 && < 5.0
                     , JuicyPixels       >= 3.2.6.4 && < 3.3
-                    , JuicyPixels-extra >= 0.1.1
+                    , JuicyPixels-extra
                     , criterion         >= 0.6.2.1 && < 1.2
   if flag(dev)
-    ghc-options:      -Wall -Werror
+    ghc-options:      -O2 -Wall -Werror
   else
     ghc-options:      -O2 -Wall
   default-language:   Haskell2010
diff --git a/LICENSE.md b/LICENSE.md
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,4 +1,4 @@
-Copyright © 2016 Mark Karpov
+Copyright © 2016–2017 Mark Karpov
 
 All rights reserved.
 
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -13,10 +13,12 @@
 
 * scaling (bi-linear interpolation);
 * cropping;
-* flipping horizontally and vertically and 90° rotation (left and right).
+* flipping horizontally and vertically;
+* 90° and 180° rotation (left and right);
+* aligning several images side by side or one on top of the other.
 
 ## License
 
-Copyright © 2016 Mark Karpov
+Copyright © 2016–2017 Mark Karpov
 
 Distributed under BSD 3 clause license.
diff --git a/bench/Main.hs b/bench/Main.hs
--- a/bench/Main.hs
+++ b/bench/Main.hs
@@ -1,7 +1,7 @@
 --
 -- Benchmarks for the ‘JuicyPixels-extra’ package.
 --
--- Copyright © 2016 Mark Karpov <markkarpov@openmailbox.org>
+-- Copyright © 2016–2017 Mark Karpov <markkarpov@openmailbox.org>
 --
 -- Redistribution and use in source and binary forms, with or without
 -- modification, are permitted provided that the following conditions are
@@ -58,7 +58,19 @@
   , bgroup "rotateRight90"
     [ baction "512 × 512" rotateRight90 "data-examples/lenna.png"
     , baction "100 × 100" rotateRight90 "data-examples/lenna-scaled-down.png" ]
+  , bgroup "rotate180"
+    [ baction "512 × 512" rotate180 "data-examples/lenna.png"
+    , baction "100 × 100" rotate180 "data-examples/lenna-scaled-down.png" ]
+  , bgroup "beside"
+    [ baction "1024 × 512" beside' "data-examples/lenna.png"
+    , baction "200 × 100"  beside' "data-examples/lenna-scaled-down.png" ]
+  , bgroup "below"
+    [ baction "512 × 1024" below' "data-examples/lenna.png"
+    , baction "100 × 200"  below' "data-examples/lenna-scaled-down.png" ]
   ]
+  where
+    beside' img = beside [img, img]
+    below'  img = below  [img, img]
 
 -- | Run a benchmark given function to benchmark and where to get image to
 -- pass as an input.
diff --git a/data-examples/lenna-180-rotated.png b/data-examples/lenna-180-rotated.png
new file mode 100644
Binary files /dev/null and b/data-examples/lenna-180-rotated.png differ
diff --git a/data-examples/lenna-below.png b/data-examples/lenna-below.png
new file mode 100644
Binary files /dev/null and b/data-examples/lenna-below.png differ
diff --git a/data-examples/lenna-beside.png b/data-examples/lenna-beside.png
new file mode 100644
Binary files /dev/null and b/data-examples/lenna-beside.png differ
diff --git a/tests/Codec/Picture/ExtraSpec.hs b/tests/Codec/Picture/ExtraSpec.hs
--- a/tests/Codec/Picture/ExtraSpec.hs
+++ b/tests/Codec/Picture/ExtraSpec.hs
@@ -1,3 +1,35 @@
+--
+-- Tests for the ‘JuicyPixels-extra’ package.
+--
+-- Copyright © 2016–2017 Mark Karpov <markkarpov@openmailbox.org>
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions are
+-- met:
+--
+-- * Redistributions of source code must retain the above copyright notice,
+--   this list of conditions and the following disclaimer.
+--
+-- * Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+--
+-- * Neither the name Mark Karpov nor the names of contributors may be used
+--   to endorse or promote products derived from this software without
+--   specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS “AS IS” AND ANY
+-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+-- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+-- ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+-- POSSIBILITY OF SUCH DAMAGE.
+
 module Codec.Picture.ExtraSpec
   ( main
   , spec )
@@ -20,6 +52,9 @@
   describe "flipVertically"    flipVerticallySpec
   describe "rotateLeft90Spec"  rotateLeft90Spec
   describe "rotateRight90Spec" rotateRight90Spec
+  describe "rotate180"         rotate180Spec
+  describe "beside"            besideSpec
+  describe "below"             belowSpec
 
 scaleBilinearSpec :: Spec
 scaleBilinearSpec = do
@@ -78,6 +113,30 @@
       checkWithFiles rotateRight90
         "data-examples/lenna.png"
         "data-examples/lenna-right-rotated.png"
+
+rotate180Spec :: Spec
+rotate180Spec =
+  context "when we rotate by 180°" $
+    it "produces correct image" $
+      checkWithFiles rotate180
+        "data-examples/lenna.png"
+        "data-examples/lenna-180-rotated.png"
+
+besideSpec :: Spec
+besideSpec =
+  context "when we place images beside each other" $
+    it "produces correct image" $
+      checkWithFiles (\x -> beside [x,x])
+        "data-examples/lenna.png"
+        "data-examples/lenna-beside.png"
+
+belowSpec :: Spec
+belowSpec =
+  context "when we place images below each other" $
+    it "produces correct image" $
+      checkWithFiles (\x -> below [x,x])
+        "data-examples/lenna.png"
+        "data-examples/lenna-below.png"
 
 -- | Run given transforming function on image loaded from one file and
 -- compare resulting image with contents of another file.