diff --git a/o/OpenMPI/OpenMPI-5.0.3-GCC-13.3.0.eb b/o/OpenMPI/OpenMPI-5.0.3-GCC-13.3.0.eb
new file mode 100644
index 00000000..3141e25e
--- /dev/null
+++ b/o/OpenMPI/OpenMPI-5.0.3-GCC-13.3.0.eb
@@ -0,0 +1,45 @@
+# IT4Innovations
+# LK 2024
+
+name = 'OpenMPI'
+version = '5.0.3'
+
+homepage = 'https://www.open-mpi.org/'
+description = """The Open MPI Project is an open source MPI-3 implementation."""
+
+toolchain = {'name': 'GCC', 'version': '13.3.0'}
+
+source_urls = ['https://www.open-mpi.org/software/ompi/v%(version_major_minor)s/downloads']
+sources = [SOURCELOWER_TAR_BZ2]
+patches = [('OpenMPI-5.0.2_build-with-internal-cuda-header.patch', 1)]
+checksums = [
+    {'openmpi-5.0.3.tar.bz2': '990582f206b3ab32e938aa31bbf07c639368e4405dca196fabe7f0f76eeda90b'},
+    {'OpenMPI-5.0.2_build-with-internal-cuda-header.patch':
+     'f52dc470543f35efef10d651dd159c771ae25f8f76a420d20d87abf4dc769ed7'},
+]
+
+builddependencies = [
+    ('pkgconf', '2.2.0'),
+    ('Autotools', '20231222'),
+]
+
+dependencies = [
+    ('zlib', '1.3.1'),
+    ('hwloc', '2.10.0'),
+    ('libevent', '2.1.12'),
+    ('UCX', '1.16.0'),
+    ('libfabric', '1.21.0'),
+    ('PMIx', '5.0.2'),
+    ('PRRTE', '3.0.5'),
+    ('UCC', '1.3.0'),
+]
+
+configopts = '--enable-shared '
+configopts += ' --enable-mpi-thread-multiple'
+configopts += ' --with-verbs'
+configopts += ' --enable-mpirun-prefix-by-default'
+configopts += ' --with-hwloc=$EBROOTHWLOC'  # hwloc support
+configopts += ' --with-slurm' # Enable slurm
+configopts += ' --with-ucx=$EBROOTUCX'
+
+moduleclass = 'mpi'
diff --git a/o/OpenMPI/OpenMPI-5.0.5-NVHPC-24.3-CUDA-12.3.0.eb b/o/OpenMPI/OpenMPI-5.0.5-NVHPC-24.3-CUDA-12.3.0.eb
new file mode 100644
index 00000000..63f86a3b
--- /dev/null
+++ b/o/OpenMPI/OpenMPI-5.0.5-NVHPC-24.3-CUDA-12.3.0.eb
@@ -0,0 +1,119 @@
+# IT4Innovations
+# LK 2024
+
+name = 'OpenMPI'
+version = '5.0.5'
+
+homepage = 'https://www.open-mpi.org/'
+description = """The Open MPI Project is an open source MPI-3 implementation."""
+
+toolchain = {'name': 'NVHPC', 'version': '24.3-CUDA-12.3.0'}
+
+source_urls = ['https://www.open-mpi.org/software/ompi/v%(version_major_minor)s/downloads']
+sources = [SOURCELOWER_TAR_BZ2]
+#patches = [
+#    'OpenMPI-4.1.1_build-with-internal-cuda-header.patch',
+#    'OpenMPI-4.1.1_opal-datatype-cuda-performance.patch',
+#]
+checksums = [
+    '6588d57c0a4bd299a24103f4e196051b29e8b55fbda49e11d5b3d32030a32776',  # openmpi-5.0.5.tar.bz2
+    # OpenMPI-4.1.1_build-with-internal-cuda-header.patch
+    #'63eac52736bdf7644c480362440a7f1f0ae7c7cae47b7565f5635c41793f8c83',
+    # OpenMPI-4.1.1_opal-datatype-cuda-performance.patch
+    #'b767c7166cf0b32906132d58de5439c735193c9fd09ec3c5c11db8d5fa68750e',
+]
+
+builddependencies = [
+    ('pkgconf', '1.9.3'),
+    ('Perl', '5.36.0'),
+    ('Autotools', '20220317'),
+]
+
+dependencies = [
+    ('zlib', '1.2.12'),
+    ('CUDA', '12.3.0', '', True),
+    ('hwloc', '2.8.0'),
+    ('libevent', '2.1.12'),
+    ('UCX', '1.16.0'),
+    ('UCX-CUDA', '1.16.0', '-CUDA-%(cudaver)s'),
+    ('libfabric', '1.16.1'),
+    ('PMIx', '5.0.2'),
+    ('UCC', '1.3.0'),
+    ('UCC-CUDA', '1.3.0', '-CUDA-%(cudaver)s'),
+    ('PRRTE', '3.0.5'),
+]
+
+# Update configure to include changes from the "internal-cuda" patch
+# by running a subset of autogen.pl sufficient to achieve this
+# without doing the full, long-running regeneration.
+#preconfigopts = ' && '.join([
+#    'cd config',
+#    'autom4te --language=m4sh opal_get_version.m4sh -o opal_get_version.sh',
+#    'cd ..',
+#    'autoconf',
+#    'autoheader',
+#    'aclocal',
+#    'automake',
+#    ''
+#])
+
+# CUDA related patches and custom configure option can be removed if CUDA support isn't wanted.
+#configopts = ' --with-cuda=internal'
+#preconfigopts = 'gcc -Iopal/mca/cuda/include -shared opal/mca/cuda/lib/cuda.c -o opal/mca/cuda/lib/libcuda.so && '
+configopts = '--with-cuda=/usr/local/cuda '
+configopts += ' CC=pgcc CXX=pgc++ FC=pgfortran'
+configopts += ' CXXFLAGS="-fPIC"'
+
+# IT4I-specific settings
+
+#configopts += '--enable-shared '
+configopts += ' --enable-mpi-thread-multiple'
+configopts += ' --with-verbs'
+configopts += ' --enable-mpirun-prefix-by-default'
+configopts += ' --with-hwloc=$EBROOTHWLOC'  # hwloc support
+configopts += ' --with-slurm' # Enable slurm
+#configopts += ' --enable-mpi-cxx'  # 5.X.X not supported
+configopts += ' --with-ucx=$EBROOTUCX'
+#configopts += ' --without-prrte' # only srun, without mpirun
+
+import os
+if os.environ.get("CLUSTERNAME") in ["BARBORA"]:
+   configopts += ' --with-knem=/opt/knem-1.1.4.90mlnx1'
+if os.environ.get("CLUSTERNAME") in ["KAROLINA"]:
+   configopts += ' --with-knem=/opt/knem-1.1.4.90mlnx3'
+
+osdependencies = [('libibverbs-dev', 'libibverbs-devel', 'rdma-core-devel')]
+
+postinstallcmds = [
+    'echo "# By default, for Open MPI 4.0 and later, infiniband ports on a device are not used by default." >> %(installdir)s/etc/openmpi-mca-params.conf',
+    'echo "btl_openib_allow_ib = true" >> %(installdir)s/etc/openmpi-mca-params.conf',
+]
+
+local_libs = ["mpi_mpifh", "mpi", "ompitrace", "open-pal", "open-rte"]
+sanity_check_paths = {
+    'files': [
+        "bin/%s" %
+        binfile for binfile in [
+            "ompi_info", "opal_wrapper" ]] + [
+                    "include/%s.h" %
+                    x for x in [
+                        "mpi-ext", "mpif-config", "mpif", "mpi", "mpi_portable_platform"]], 'dirs': [], }
+
+if os.environ.get("CLUSTERNAME") in ["BARBORA"]:
+   modextravars = {'OMPI_MCA_btl_openib_if_include': 'mlx5_0',
+                'OMPI_MCA_btl_tcp_if_include': '10.33.4.0/24',
+                'OMPI_MCA_orte_base_help_aggregate': '0',
+                'SLURM_MPI_TYPE': 'pmix_v4',
+   }
+elif os.environ.get("CLUSTERNAME") in ["KAROLINA"]:
+   modextravars = {'OMPI_MCA_btl_openib_if_include': 'mlx5_0',
+                'OMPI_MCA_orte_base_help_aggregate': '0',
+                'SLURM_MPI_TYPE': 'pmix_v4',
+   }
+else:
+   modextravars = {'OMPI_MCA_btl_openib_if_include': 'mlx4_0',
+                'OMPI_MCA_oob_tcp_if_include': '10.0.0.0/8',
+                'SLURM_MPI_TYPE': 'pmix_v4',
+   }
+
+moduleclass = 'mpi'
diff --git a/p/PMIx/PMIx-5.0.2-GCCcore-12.2.0.eb b/p/PMIx/PMIx-5.0.2-GCCcore-12.2.0.eb
new file mode 100644
index 00000000..cab7243d
--- /dev/null
+++ b/p/PMIx/PMIx-5.0.2-GCCcore-12.2.0.eb
@@ -0,0 +1,48 @@
+# IT4Innovations
+# LK 2024
+
+easyblock = 'ConfigureMake'
+
+name = 'PMIx'
+version = '5.0.2'
+
+homepage = 'https://pmix.org/'
+description = """Process Management for Exascale Environments
+PMI Exascale (PMIx) represents an attempt to
+provide an extended version of the PMI standard specifically designed
+to support clusters up to and including exascale sizes. The overall
+objective of the project is not to branch the existing pseudo-standard
+definitions - in fact, PMIx fully supports both of the existing PMI-1
+and PMI-2 APIs - but rather to (a) augment and extend those APIs to
+eliminate some current restrictions that impact scalability, and (b)
+provide a reference implementation of the PMI-server that demonstrates
+the desired level of scalability.
+"""
+
+toolchain = {'name': 'GCCcore', 'version': '12.2.0'}
+toolchainopts = {'pic': True}
+
+source_urls = ['https://github.com/openpmix/openpmix/releases/download/v%(version)s']
+sources = ['%(namelower)s-%(version)s.tar.bz2']
+checksums = ['28227ff2ba925da2c3fece44502f23a91446017de0f5a58f5cea9370c514b83c']
+
+builddependencies = [('binutils', '2.39')]
+
+dependencies = [
+    ('zlib', '1.2.12'),
+    ('libevent', '2.1.12'),
+    ('hwloc', '2.8.0'),
+]
+
+configopts = ' --with-libevent=$EBROOTLIBEVENT --with-zlib=$EBROOTZLIB'
+configopts += ' --with-hwloc=$EBROOTHWLOC'
+configopts += ' --enable-pmix-binaries'
+
+buildopts = 'V=1'
+
+sanity_check_paths = {
+    'files': ['bin/pevent', 'bin/plookup', 'bin/pmix_info', 'bin/pps'],
+    'dirs': ['etc', 'include', 'lib', 'share']
+}
+
+moduleclass = 'lib'
diff --git a/p/PRRTE/PRRTE-3.0.5-GCCcore-12.2.0.eb b/p/PRRTE/PRRTE-3.0.5-GCCcore-12.2.0.eb
new file mode 100644
index 00000000..d0dc09ba
--- /dev/null
+++ b/p/PRRTE/PRRTE-3.0.5-GCCcore-12.2.0.eb
@@ -0,0 +1,41 @@
+# IT4Innovations
+# LK 2024
+
+easyblock = 'ConfigureMake'
+
+name = 'PRRTE'
+version = '3.0.5'
+
+homepage = 'https://docs.prrte.org/'
+description = """PRRTE is the PMIx Reference RunTime Environment"""
+
+toolchain = {'name': 'GCCcore', 'version': '12.2.0'}
+toolchainopts = {'pic': True}
+
+source_urls = ['https://github.com/openpmix/prrte/releases/download/v%(version)s']
+sources = ['%(namelower)s-%(version)s.tar.bz2']
+checksums = ['75ce732b02f3bc7eff5e51b81469e4373f1effc6a42d8445e2935d3670e58c8e']
+
+builddependencies = [('binutils', '2.39')]
+
+dependencies = [
+    ('libevent', '2.1.12'),
+    ('hwloc', '2.8.0'),
+    ('PMIx', '5.0.2'),
+]
+
+configopts = ' --with-libevent=$EBROOTLIBEVENT'
+configopts += ' --with-hwloc=$EBROOTHWLOC --with-pmix=$EBROOTPMIX'
+
+buildopts = 'V=1'
+
+local_binaries = ['prte', 'prte_info', 'prterun', 'prun', 'pterm']
+
+sanity_check_paths = {
+    'files': ['bin/%s' % x for x in local_binaries] + ['lib/libprrte.%s' % SHLIB_EXT],
+    'dirs': ['etc', 'include', 'share']
+}
+
+sanity_check_commands = ['%s --version' % x for x in local_binaries]
+
+moduleclass = 'lib'