diff --git a/d/dotNET-Core-Runtime/dotNET-Core-Runtime-3.0.0.eb b/d/dotNET-Core-Runtime/dotNET-Core-Runtime-3.0.0.eb
new file mode 100644
index 00000000..c1d007d6
--- /dev/null
+++ b/d/dotNET-Core-Runtime/dotNET-Core-Runtime-3.0.0.eb
@@ -0,0 +1,28 @@
+easyblock = 'Tarball'
+
+# note: only works on recent OSs, required sufficiently recent glibc (2.14
+# or newer)
+name = 'dotNET-Core-Runtime'
+version = '3.0.0'
+
+homepage = 'https://www.microsoft.com/net/'
+description = """.NET is a free, cross-platform, open source developer platform for building many different types
+ of applications."""
+
+toolchain = {'name': 'system', 'version': ''}
+
+source_urls = ['https://download.visualstudio.microsoft.com/download/pr/a5ff9cbb-d558-49d1-9fd2-410cb1c8b095/a940644f4133b81446cb3733a620983a/']
+sources = ['dotnet-runtime-%(version)s-linux-x64.tar.gz']
+
+dependencies = [
+    ('libunwind', '1.2'),
+]
+
+sanity_check_paths = {
+    'files': ['dotnet'],
+    'dirs': ['shared/Microsoft.NETCore.App/%(version)s'],
+}
+
+modextrapaths = {'PATH': ['']}
+
+moduleclass = 'lang'
diff --git a/d/dotNET-Core-SDK/dotNET-Core-SDK-3.0.100.eb b/d/dotNET-Core-SDK/dotNET-Core-SDK-3.0.100.eb
new file mode 100644
index 00000000..78fa4b5a
--- /dev/null
+++ b/d/dotNET-Core-SDK/dotNET-Core-SDK-3.0.100.eb
@@ -0,0 +1,26 @@
+easyblock = 'Tarball'
+
+# note: only works on recent OSs, required sufficiently recent glibc (2.14
+# or newer)
+name = 'dotNET-Core-SDK'
+version = '3.0.100'
+
+homepage = 'https://www.microsoft.com/net/'
+description = """.NET is a free, cross-platform, open source developer platform for building many different types
+ of applications."""
+
+toolchain = {'name': 'system', 'version': ''}
+
+source_urls = ['https://download.visualstudio.microsoft.com/download/pr/886b4a4c-30af-454b-8bec-81c72b7b4e1f/d1a0c8de9abb36d8535363ede4a15de6']
+sources = ['dotnet-sdk-%(version)s-linux-x64.tar.gz']
+
+dependencies = [('libunwind', '1.2')]
+
+sanity_check_paths = {
+    'files': ['dotnet'],
+    'dirs': ['sdk'],
+}
+
+modextrapaths = {'PATH': ['']}
+
+moduleclass = 'lang'
diff --git a/v/Valgrind/Valgrind-3.15.0-foss-2019a.eb b/v/Valgrind/Valgrind-3.15.0-foss-2019a.eb
new file mode 100644
index 00000000..f8822ddb
--- /dev/null
+++ b/v/Valgrind/Valgrind-3.15.0-foss-2019a.eb
@@ -0,0 +1,29 @@
+# IT4Innovations 2019
+
+easyblock = 'ConfigureMake'
+
+name = 'Valgrind'
+version = "3.15.0"
+
+homepage = 'http://valgrind.org/downloads/'
+description = "Valgrind: Debugging and profiling tools"
+
+toolchain = {'name': 'foss', 'version': '2019a'}
+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'