diff --git a/libffi/3.2.1/0001-Includes-should-go-in-includedir-not-libdir.patch b/libffi/3.2.1/0001-Includes-should-go-in-includedir-not-libdir.patch
new file mode 100644
index 0000000..a591ace
--- /dev/null
+++ b/libffi/3.2.1/0001-Includes-should-go-in-includedir-not-libdir.patch
@@ -0,0 +1,42 @@
+From b1184c2c41de4efc26866e6fb93cb9c694f14f8f Mon Sep 17 00:00:00 2001
+From: Luis Lavena <luislavena@gmail.com>
+Date: Sat, 3 Jul 2010 12:48:20 -0300
+Subject: [PATCH] Includes should go in includedir, not libdir.
+
+This patch corrects the installation of ffi.h and ffitarget.h
+to properly put in $(includedir) instead of $(libdir)
+
+It also avoids prepending package name and version to it, causing
+issues by development tools trying to find it.
+---
+ include/Makefile.am |    2 +-
+ include/Makefile.in |    2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/include/Makefile.am b/include/Makefile.am
+index fd28024..15301d6 100644
+--- a/include/Makefile.am
++++ b/include/Makefile.am
+@@ -5,5 +5,5 @@ AUTOMAKE_OPTIONS=foreign
+ DISTCLEANFILES=ffitarget.h
+ EXTRA_DIST=ffi.h.in ffi_common.h
+ 
+-includesdir = $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
++includesdir = $(includedir)
+ nodist_includes_HEADERS = ffi.h ffitarget.h
+diff --git a/include/Makefile.in b/include/Makefile.in
+index f370697..c62d6c4 100644
+--- a/include/Makefile.in
++++ b/include/Makefile.in
+@@ -204,7 +204,7 @@ top_srcdir = @top_srcdir@
+ AUTOMAKE_OPTIONS = foreign
+ DISTCLEANFILES = ffitarget.h
+ EXTRA_DIST = ffi.h.in ffi_common.h
+-includesdir = $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
++includesdir = $(includedir)
+ nodist_includes_HEADERS = ffi.h ffitarget.h
+ all: all-am
+ 
+-- 
+1.7.1.msysgit.0
+
diff --git a/libffi/3.2.1/libffi-3.2.1.knapfile b/libffi/3.2.1/libffi-3.2.1.knapfile
new file mode 100644
index 0000000..6f233cd
--- /dev/null
+++ b/libffi/3.2.1/libffi-3.2.1.knapfile
@@ -0,0 +1,7 @@
+recipe "libffi", "3.2.1" do
+  use :autotools
+  use :patch
+
+  fetch "ftp://sourceware.org/pub/libffi/#{name}-#{version}.tar.gz",
+    :md5 => "83b89587607e3eb65c70d361f13bab43"
+end
diff --git a/openssl/openssl-1.0.1t.knapfile b/openssl/openssl-1.0.1t.knapfile
new file mode 100644
index 0000000..3a1888b
--- /dev/null
+++ b/openssl/openssl-1.0.1t.knapfile
@@ -0,0 +1,36 @@
+recipe "openssl", "1.0.1t" do
+  use :autotools
+
+  fetch "https://www.openssl.org/source/openssl-1.0.1t.tar.gz",
+    :md5 => "9837746fcf8a6727d46d22ca35953da1"
+  depends_on "zlib"
+
+  before :extract do
+    # ignore symlink errors from package
+    if platform.mingw?
+      options.ignore_extract_errors = true
+    end
+  end
+
+  action :configure do
+    cmd = ["perl"]
+    if platform.posix?
+      cmd << "config"
+    else
+      cmd << "Configure"
+    end
+
+    if platform.mingw?
+      if platform.x64?
+        cmd << "mingw64"
+      else
+        cmd << "mingw"
+      end
+    end
+
+    cmd << "zlib-dynamic shared"
+    cmd << "--prefix=#{install_path}"
+
+    run cmd.join(" ")
+  end
+end
diff --git a/openssl/openssl-1.0.2h.knapfile b/openssl/openssl-1.0.2h.knapfile
new file mode 100644
index 0000000..e1eedd5
--- /dev/null
+++ b/openssl/openssl-1.0.2h.knapfile
@@ -0,0 +1,36 @@
+recipe "openssl", "1.0.2h" do
+  use :autotools
+
+  fetch "https://www.openssl.org/source/openssl-1.0.2h.tar.gz",
+    :md5 => "9392e65072ce4b614c1392eefc1f23d0"
+  depends_on "zlib"
+
+  before :extract do
+    # ignore symlink errors from package
+    if platform.mingw?
+      options.ignore_extract_errors = true
+    end
+  end
+
+  action :configure do
+    cmd = ["perl"]
+    if platform.posix?
+      cmd << "config"
+    else
+      cmd << "Configure"
+    end
+
+    if platform.mingw?
+      if platform.x64?
+        cmd << "mingw64"
+      else
+        cmd << "mingw"
+      end
+    end
+
+    cmd << "zlib-dynamic shared"
+    cmd << "--prefix=#{install_path}"
+
+    run cmd.join(" ")
+  end
+end
diff --git a/tcl/tcl-8.5.19.knapfile b/tcl/tcl-8.5.19.knapfile
new file mode 100644
index 0000000..58b4018
--- /dev/null
+++ b/tcl/tcl-8.5.19.knapfile
@@ -0,0 +1,14 @@
+recipe "tcl", "8.5.19" do
+  use :autotools
+  use :patch
+
+  fetch "http://prdownloads.sourceforge.net/tcl/#{name}#{version}-src.tar.gz",
+    :md5 => "4f4e1c919f6a6dbb37e9a12d429769a6"
+
+  before :configure do
+    # FIXME: see why run does not support :chdir
+    run 'cd win && sh -c "autoconf"'
+    options.configure = "win/configure"
+    options.configure_args << "--enable-threads"
+  end
+end
diff --git a/tk/tk-8.5.19.knapfile b/tk/tk-8.5.19.knapfile
new file mode 100644
index 0000000..335b204
--- /dev/null
+++ b/tk/tk-8.5.19.knapfile
@@ -0,0 +1,15 @@
+recipe "tk", "8.5.19" do
+  use :autotools
+
+  depends_on "tcl"
+
+  fetch "http://prdownloads.sourceforge.net/tcl/#{name}#{version}-src.tar.gz",
+    :md5 => "e89df710447cce0fc0bde65667c12f85"
+
+  before :configure do
+    options.configure = "win/configure"
+    options.configure_args << "--enable-threads"
+    tcl_path = Knapsack.work_path("tcl", version, platform)
+    options.configure_args << "--with-tcl=#{tcl_path}"
+  end
+end