diff --git a/f/foss/foss-2017b.eb b/f/foss/foss-2017b.eb
new file mode 100644
index 00000000..99dc6645
--- /dev/null
+++ b/f/foss/foss-2017b.eb
@@ -0,0 +1,33 @@
+easyblock = 'Toolchain'
+
+name = 'foss'
+version = '2017b'
+
+homepage = '(none)'
+description = """GNU Compiler Collection (GCC) based compiler toolchain, including
+ OpenMPI for MPI support, OpenBLAS (BLAS and LAPACK support), FFTW and ScaLAPACK."""
+
+toolchain = {'name': 'dummy', 'version': 'dummy'}
+
+gccver = '6.3.0-2.27'
+
+blaslib = 'OpenBLAS'
+blasver = '0.2.20'
+blas = '%s-%s' % (blaslib, blasver)
+
+# toolchain used to build foss dependencies
+comp_mpi_tc_name = 'gompi'
+comp_mpi_tc = (comp_mpi_tc_name, version)
+
+# we need GCC and OpenMPI as explicit dependencies instead of gompi toolchain
+# because of toolchain preparation functions
+# For binutils, stick to http://wiki.osdev.org/Cross-Compiler_Successful_Builds
+dependencies = [
+    ('GCC', gccver),
+    ('OpenMPI', '2.1.1', '', ('GCC', gccver)),
+    (blaslib, blasver, '', ('GCC', gccver)),
+    ('FFTW', '3.3.6', '', comp_mpi_tc),
+    ('ScaLAPACK', '2.0.2', '-%s' % blas, comp_mpi_tc),
+]
+
+moduleclass = 'toolchain'
diff --git a/g/gompi/gompi-2017b.eb b/g/gompi/gompi-2017b.eb
new file mode 100644
index 00000000..177d5902
--- /dev/null
+++ b/g/gompi/gompi-2017b.eb
@@ -0,0 +1,20 @@
+easyblock = "Toolchain"
+
+name = 'gompi'
+version = '2017b'
+
+homepage = '(none)'
+description = """GNU Compiler Collection (GCC) based compiler toolchain,
+ including OpenMPI for MPI support."""
+
+toolchain = {'name': 'dummy', 'version': 'dummy'}
+
+gccver = '6.3.0-2.27'
+
+# compiler toolchain dependencies
+dependencies = [
+    ('GCC', gccver),  # includes both GCC and binutils
+    ('OpenMPI', '2.1.1', '', ('GCC', gccver)),
+]
+
+moduleclass = 'toolchain'
diff --git a/o/OpenBLAS/OpenBLAS-0.2.20-GCC-6.3.0-2.27.eb b/o/OpenBLAS/OpenBLAS-0.2.20-GCC-6.3.0-2.27.eb
new file mode 100644
index 00000000..d14b45a6
--- /dev/null
+++ b/o/OpenBLAS/OpenBLAS-0.2.20-GCC-6.3.0-2.27.eb
@@ -0,0 +1,51 @@
+easyblock = 'ConfigureMake'
+
+name = 'OpenBLAS'
+version = '0.2.20'
+
+homepage = 'http://xianyi.github.com/OpenBLAS/'
+description = "OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version."
+
+toolchain = {'name': 'GCC', 'version': '6.3.0-2.27'}
+
+large_src = 'large.tgz'
+timing_src = 'timing.tgz'
+
+source_urls = [
+    # order matters, trying to download the large.tgz/timing.tgz LAPACK tarballs from GitHub causes trouble
+    'http://www.netlib.org/lapack/timing/',
+    'https://github.com/xianyi/OpenBLAS/archive/',
+]
+sources = ['v%(version)s.tar.gz']
+checksums = [
+    '5ef38b15d9c652985774869efd548b8e3e972e1e99475c673b25537ed7bcf394',  # v0.2.20.tar.gz (OpenBLAS)
+    'f328d88b7fa97722f271d7d0cfea1c220e0f8e5ed5ff01d8ef1eb51d6f4243a1',  # large.tgz
+    '999c65f8ea8bd4eac7f1c7f3463d4946917afd20a997807300fe35d70122f3af',  # timing.tgz
+    # OpenBLAS-0.2.20_fix-Intel-L1-cache-size-detection.patch
+    '1d043e4838ec1f90b2b49318b780e3ab13b46133cb72a8d83eb0e3b1b056c4d6',
+    '1e6a046ab658c6e0b351de901d2812db28c2042f9f141416144c2faaf71fbb37',  # OpenBLAS-0.2.20_revert-honor-cpuset.patch
+]
+
+patches = [
+    (large_src, '.'),
+    (timing_src, '.'),
+    'OpenBLAS-%(version)s_fix-Intel-L1-cache-size-detection.patch',
+    'OpenBLAS-%(version)s_revert-honor-cpuset.patch',
+]
+
+skipsteps = ['configure']
+
+buildopts = 'BINARY=64 USE_THREAD=1 USE_OPENMP=1 CC="$CC" FC="$F77"'
+installopts = "USE_THREAD=1 USE_OPENMP=1 PREFIX=%(installdir)s"
+
+# extensive testing can be enabled by uncommenting the line below
+# runtest = 'PATH=.:$PATH lapack-timing'
+
+sanity_check_paths = {
+    'files': ['include/cblas.h', 'include/f77blas.h', 'include/lapacke_config.h', 'include/lapacke.h',
+              'include/lapacke_mangling.h', 'include/lapacke_utils.h', 'include/openblas_config.h',
+              'lib/libopenblas.a', 'lib/libopenblas.%s' % SHLIB_EXT],
+    'dirs': [],
+}
+
+moduleclass = 'numlib'
diff --git a/s/ScaLAPACK/ScaLAPACK-2.0.2-gompi-2017b-OpenBLAS-0.2.20.eb b/s/ScaLAPACK/ScaLAPACK-2.0.2-gompi-2017b-OpenBLAS-0.2.20.eb
new file mode 100644
index 00000000..644a5fdc
--- /dev/null
+++ b/s/ScaLAPACK/ScaLAPACK-2.0.2-gompi-2017b-OpenBLAS-0.2.20.eb
@@ -0,0 +1,22 @@
+name = 'ScaLAPACK'
+version = '2.0.2'
+
+homepage = 'http://www.netlib.org/scalapack/'
+description = """The ScaLAPACK (or Scalable LAPACK) library includes a subset of LAPACK routines
+ redesigned for distributed memory MIMD parallel computers."""
+
+toolchain = {'name': 'gompi', 'version': '2017b'}
+toolchainopts = {'pic': True}
+
+source_urls = [homepage]
+sources = [SOURCELOWER_TGZ]
+checksums = ['0c74aeae690fe5ee4db7926f49c5d0bb69ce09eea75beb915e00bba07530395c']
+
+blaslib = 'OpenBLAS'
+blasver = '0.2.20'
+
+versionsuffix = "-%s-%s" % (blaslib, blasver)
+
+dependencies = [(blaslib, blasver, '', ('GCC', '6.3.0-2.27'))]
+
+moduleclass = 'numlib'