diff --git a/Data/Default/Instances/Containers.hs b/Data/Default/Instances/Containers.hs
new file mode 100644
--- /dev/null
+++ b/Data/Default/Instances/Containers.hs
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+{-
+
+Copyright (c) 2013 Lukas Mai
+
+All rights reserved.
+
+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 of the author nor the names of his contributors
+  may be used to endorse or promote products derived from this software
+  without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY LUKAS MAI AND CONTRIBUTORS "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 REGENTS OR CONTRIBUTORS 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 Data.Default.Instances.Containers (
+-- | This module defines 'Default' instances for the types 'S.Set', 'M.Map',
+-- 'IntMap', 'IntSet', 'Seq', and 'Tree'.
+) where
+
+import Data.Default.Class
+import Data.Monoid (mempty)
+import qualified Data.Set as S
+import qualified Data.Map as M
+import Data.IntMap (IntMap)
+import Data.IntSet (IntSet)
+import Data.Sequence (Seq)
+import Data.Tree (Tree(..))
+
+instance Default (S.Set v) where def = S.empty
+instance Default (M.Map k v) where def = M.empty
+instance Default (IntMap v) where def = mempty
+instance Default IntSet where def = mempty
+instance Default (Seq a) where def = mempty
+instance (Default a) => Default (Tree a) where def = Node def []
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+Copyright (c) 2013 Lukas Mai
+
+All rights reserved.
+
+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 of the author nor the names of his contributors
+  may be used to endorse or promote products derived from this software
+  without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY LUKAS MAI AND CONTRIBUTORS "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 REGENTS OR CONTRIBUTORS 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.
diff --git a/Setup.lhs b/Setup.lhs
new file mode 100644
--- /dev/null
+++ b/Setup.lhs
@@ -0,0 +1,4 @@
+#!/usr/bin/env runhaskell
+> import Distribution.Simple
+> main :: IO ()
+> main = defaultMain
diff --git a/data-default-instances-containers.cabal b/data-default-instances-containers.cabal
new file mode 100644
--- /dev/null
+++ b/data-default-instances-containers.cabal
@@ -0,0 +1,18 @@
+Name:            data-default-instances-containers
+Version:         0.0.1
+Cabal-Version:   >= 1.6
+Category:        Data
+Synopsis:        Default instances for types in containers
+Build-Type:      Simple
+License:         BSD3
+License-File:    LICENSE
+Author:          Lukas Mai
+Maintainer:      <l.mai@web.de>
+
+source-repository head
+  type: git
+  location: https://github.com/mauke/data-default
+
+Library
+  Build-Depends:     base >=2 && <5, data-default-class, containers
+  Exposed-Modules:   Data.Default.Instances.Containers