diff --git a/d/dos2unix/dos2unix-7.4.2.eb b/d/dos2unix/dos2unix-7.4.2.eb
new file mode 100644
index 00000000..b9acc7d9
--- /dev/null
+++ b/d/dos2unix/dos2unix-7.4.2.eb
@@ -0,0 +1,29 @@
+# IT4Innovations 2021
+# LK
+
+easyblock = 'ConfigureMake'
+
+name = 'dos2unix'
+version = '7.4.2'
+
+homepage = 'https://sourceforge.net/projects/dos2unix'
+description = "dos2unix includes utilities to convert text files with DOS or MAC line breaks to Unix line breaks and vice versa. It also includes conversion of UTF-16 to UTF-8."
+
+toolchain = SYSTEM
+toolchainopts = {'optarch': True, 'pic': True}
+
+source_urls = ['https://sourceforge.net/projects/dos2unix/files/dos2unix/-%(version)s/']
+sources = ['dos2unix-%(version)s.tar.gz']
+
+skipsteps = ['configure']
+
+dependencies = [ ('gettext', '0.21', '', True) ]
+
+installopts = "prefix=%(installdir)s"
+
+sanity_check_paths = {
+    'files': ['bin/dos2unix', 'bin/unix2dos'],
+    'dirs': ['bin', 'share'],
+}
+
+moduleclass = 'tools'
diff --git a/j/Julia/Julia-1.5.3-linux-x86_64.eb b/j/Julia/Julia-1.5.3-linux-x86_64.eb
new file mode 100644
index 00000000..d3ce0aeb
--- /dev/null
+++ b/j/Julia/Julia-1.5.3-linux-x86_64.eb
@@ -0,0 +1,23 @@
+# IT4Innovations 2021
+# LK
+
+easyblock = 'Tarball'
+
+name = 'Julia'
+version = '1.5.3'
+versionsuffix = '-linux-x86_64'
+
+homepage = 'https://julialang.org'
+description = "Julia is a high-level, high-performance dynamic programming language for numerical computing"
+
+toolchain = SYSTEM
+
+source_urls = ['https://julialang-s3.julialang.org/bin/linux/x64/%(version_major_minor)s/']
+sources = ['%(namelower)s-%(version)s%(versionsuffix)s.tar.gz']
+
+sanity_check_paths = {
+    'files': ['bin/julia', 'include/julia/julia.h', 'lib/libjulia.so'],
+    'dirs': ['bin', 'etc', 'include', 'lib', 'share']
+}
+
+moduleclass = 'lang'
diff --git a/o/OpenMPI/OpenMPI-4.0.5-gcccuda-2020b.eb b/o/OpenMPI/OpenMPI-4.0.5-gcccuda-2020b.eb
new file mode 100644
index 00000000..04b27d58
--- /dev/null
+++ b/o/OpenMPI/OpenMPI-4.0.5-gcccuda-2020b.eb
@@ -0,0 +1,43 @@
+# IT4Innovations 2021
+# LK
+
+name = 'OpenMPI'
+version = '4.0.5'
+
+homepage = 'https://www.open-mpi.org/'
+description = """The Open MPI Project is an open source MPI-3 implementation."""
+
+toolchain = {'name': 'gcccuda', 'version': '2020b'}
+
+source_urls = ['https://www.open-mpi.org/software/ompi/v%(version_major_minor)s/downloads']
+sources = [SOURCELOWER_TAR_GZ]
+checksums = ['572e777441fd47d7f06f1b8a166e7f44b8ea01b8b2e79d1e299d509725d1bd05']
+
+builddependencies = [
+    ('pkg-config', '0.29.2'),
+]
+
+dependencies = [
+    ('zlib', '1.2.11'),
+    ('hwloc', '2.2.0'),
+    ('libevent', '2.1.12'),
+    ('UCX', '1.9.0', '-CUDA-11.1.1'),
+    ('libfabric', '1.11.0'),
+    ('PMIx', '3.1.5'),
+]
+
+configopts = '--enable-shared --enable-mpi-thread-multiple --with-verbs '
+configopts += '--enable-mpirun-prefix-by-default '
+#configopts += '--with-hwloc=$EBROOTHWLOC '  # hwloc support
+configopts += '--with-tm=/opt/pbs '  # Enable PBS
+configopts += '--enable-mpi-cxx '  # Enable building the C++ MPI bindings
+#configopts += '--with-ucx=$EBROOTUCX '
+#configopts += '--with-cuda=$EBROOTCUDA '
+
+# disable MPI1 compatibility for now, see what breaks...
+# configopts = '--enable-mpi1-compatibility '
+
+# to enable SLURM integration (site-specific)
+# configopts += '--with-slurm --with-pmi=/usr/include/slurm --with-pmi-libdir=/usr'
+
+moduleclass = 'mpi'
diff --git a/v/Valgrind/Valgrind-3.16.1-gompi-2020b.eb b/v/Valgrind/Valgrind-3.16.1-gompi-2020b.eb
new file mode 100644
index 00000000..af984b95
--- /dev/null
+++ b/v/Valgrind/Valgrind-3.16.1-gompi-2020b.eb
@@ -0,0 +1,39 @@
+# IT4Innovations 2021
+# LK
+
+easyblock = 'ConfigureMake'
+
+name = 'Valgrind'
+version = '3.16.1'
+
+homepage = 'https://valgrind.org'
+description = "Valgrind: Debugging and profiling tools"
+
+toolchain = {'name': 'gompi', 'version': '2020b'}
+toolchainopts = {'optarch': True}
+
+source_urls = [
+    'ftp://sourceware.org/pub/valgrind/',
+    'https://www.mirrorservice.org/sites/sourceware.org/pub/valgrind/',
+]
+sources = [SOURCELOWER_TAR_BZ2]
+patches = ['Valgrind-3.15.0-no-MPI-1.patch']
+checksums = [
+    'c91f3a2f7b02db0f3bc99479861656154d241d2fdb265614ba918cc6720a33ca',  # valgrind-3.16.1.tar.bz2
+    'e99464ad9f2d2e74c5c50d2fa1bcf8637295b11cd841102035f8601b01afd85f',  # Valgrind-3.15.0-no-MPI-1.patch
+]
+
+configopts = ' --with-mpicc="$MPICC"'
+
+local_binaries = [
+    'callgrind_annotate', 'callgrind_control', 'cg_annotate', 'cg_diff',
+    'cg_merge', 'ms_print', 'valgrind', 'valgrind-listener', 'vgdb'
+]
+
+sanity_check_paths = {
+    'files': ['bin/%s' % x for x in local_binaries] +
+             ['lib/valgrind/libmpiwrap-amd64-linux.%s' % SHLIB_EXT],
+    'dirs': []
+}
+
+moduleclass = 'debugger'
diff --git a/v/Valgrind/Valgrind-3.16.1-intel-2020b.eb b/v/Valgrind/Valgrind-3.16.1-intel-2020b.eb
new file mode 100644
index 00000000..5f19c115
--- /dev/null
+++ b/v/Valgrind/Valgrind-3.16.1-intel-2020b.eb
@@ -0,0 +1,30 @@
+# IT4Innovations 2021
+# LK
+
+easyblock = 'ConfigureMake'
+
+name = 'Valgrind'
+version = "3.16.1"
+
+homepage = 'http://valgrind.org/downloads/'
+description = "Valgrind: Debugging and profiling tools"
+
+toolchain = {'name': 'intel', 'version': '2020b'}
+toolchainopts = {'optarch': False}
+
+source_urls = ['https://sourceware.org/pub/valgrind/']
+sources = [SOURCELOWER_TAR_BZ2]
+
+configopts = ' --with-mpicc="$MPICC"'
+
+binaries = [
+    'callgrind_annotate', 'callgrind_control', 'cg_annotate', 'cg_diff',
+    'cg_merge', 'ms_print', 'valgrind', 'valgrind-listener', 'vgdb'
+]
+
+sanity_check_paths = {
+    'files': ['bin/%s' % x for x in binaries],
+    'dirs': []
+}
+
+moduleclass = 'debugger'