diff --git a/easybuild/easyconfigs/g/glslang-SPIRV/glslang-SPIRV-15.4.0-GCCcore-14.3.0.eb b/easybuild/easyconfigs/g/glslang-SPIRV/glslang-SPIRV-15.4.0-GCCcore-14.3.0.eb
new file mode 100644
index 000000000000..a421ca1c6617
--- /dev/null
+++ b/easybuild/easyconfigs/g/glslang-SPIRV/glslang-SPIRV-15.4.0-GCCcore-14.3.0.eb
@@ -0,0 +1,75 @@
+easyblock = 'CMakeMake'
+
+name = 'glslang-SPIRV'
+version = '15.4.0'
+
+homepage = 'https://www.khronos.org/opengles/sdk/tools/Reference-Compiler/'
+description = """Glslang is the official reference compiler front end for the OpenGL ES and OpenGL shading languages.
+It implements a strict interpretation of the specifications for these languages. It is open and free for anyone to use,
+either from a command line or programmatically. The OpenGL and OpenGL ES working groups are committed to maintaining
+consistency between the reference compiler and the corresponding shading language specifications."""
+
+toolchain = {'name': 'GCCcore', 'version': '14.3.0'}
+toolchainopts = {'pic': True}
+
+# From https://github.com/KhronosGroup/glslang/blob/15.4.0/known_good.json
+local_spirv_tools_commit = '33e02568181e3312f49a3cf33df470bf96ef293a'  # equivalent to v2025.3.0.rc1
+local_spirv_headers_commit = '2a611a970fdbc41ac2e3e328802aed9985352dca'  # equivalent to v1.4.321.0
+local_googletest_commit = 'f8d7d77c06936315286eb55f8de22cd23c188571'  # equivalent to tag v1.14.0
+
+local_github_repos = [
+    ("KhronosGroup", "SPIRV-Tools", local_spirv_tools_commit, 'spirv-tools'),
+    ("KhronosGroup", "SPIRV-Headers", local_spirv_headers_commit, 'spirv-tools/external/spirv-headers'),
+    ("google", "googletest", local_googletest_commit, 'googletest'),
+]
+
+sources = ['https://github.com/KhronosGroup/glslang/archive/%(version)s.tar.gz']
+
+# Extend the sources by adding external components from their respective GitHub repos at the known good commits
+local_ext_dir = "%(builddir)s/glslang-%(version)s/External"  # Where the external components are expected to be
+local_ext_cmd = "tar xvf %s --strip-components=1 -C $_"
+for local_owner, local_repo, local_commit, local_dir in local_github_repos:
+    sources.append({
+        "filename": f"{local_repo}-{local_commit[:8]}.tar.xz",
+        "extract_cmd": f"mkdir -p {local_ext_dir}/{local_dir} && {local_ext_cmd}",
+        "git_config": {
+            "url": f"https://github.com/{local_owner}",
+            "repo_name": local_repo,
+            "commit": local_commit,
+        },
+    })
+
+checksums = [
+    {'15.4.0.tar.gz': 'b16c78e7604b9be9f546ee35ad8b6db6f39bbbbfb19e8d038b6fe2ea5bba4ff4'},
+    {'SPIRV-Tools-33e02568.tar.xz': '57cc1a374b2d4829a3165b586f287d33e6beb4ee69d49e42c80a2cd2e8983c1d'},
+    {'SPIRV-Headers-2a611a97.tar.xz': '0333b5d2c63b95be3771a3146b3692e7a6720889187275669119c14a48e3fd6e'},
+    {'googletest-f8d7d77c.tar.xz': '8dd1ff67f8abca903d3f03c78eaae7b2076a73f465cb1f369f3698bfbd6f4aad'},
+]
+
+builddependencies = [
+    ('binutils', '2.44'),
+    ('CMake', '4.0.3'),
+    ('Bison', '3.8.2'),
+]
+
+dependencies = [
+    ('Python', '3.13.5'),  # Only needed with SPIRV
+]
+
+configopts = "-DENABLE_OPT=ON"  # Needed if SPIRV is used
+
+runtest = True
+
+sanity_check_paths = {
+    'files': [
+        'bin/glslang',
+        'lib/libglslang.a', 'lib/libGenericCodeGen.a', 'lib/libSPIRV.a',
+    ],
+    'dirs': ['include/glslang'],
+}
+
+sanity_check_commands = [
+    'glslang --version',
+]
+
+moduleclass = 'compiler'
diff --git a/easybuild/easyconfigs/l/libclc/libclc-20.1.8-GCCcore-14.3.0.eb b/easybuild/easyconfigs/l/libclc/libclc-20.1.8-GCCcore-14.3.0.eb
new file mode 100644
index 000000000000..77d0090a1011
--- /dev/null
+++ b/easybuild/easyconfigs/l/libclc/libclc-20.1.8-GCCcore-14.3.0.eb
@@ -0,0 +1,32 @@
+easyblock = 'CMakeMake'
+
+name = 'libclc'
+version = '20.1.8'
+
+homepage = 'https://libclc.llvm.org/'
+description = """
+libclc is an open source, BSD/MIT dual licensed implementation of the library requirements of the OpenCL
+C programming language, as specified by the OpenCL 1.1 Specification.
+"""
+
+toolchain = {'name': 'GCCcore', 'version': '14.3.0'}
+
+source_urls = ['https://github.com/llvm/llvm-project/releases/download/llvmorg-%(version)s/']
+sources = ['libclc-%(version)s.src.tar.xz']
+checksums = ['ecd83a52859742f71f4c332538f8bee54a6743374a233b5a85017de22d75c227']
+
+builddependencies = [
+    ('binutils', '2.44'),
+    ('CMake', '4.0.3'),
+    ('LLVM', '20.1.8'),
+]
+
+sanity_check_paths = {
+    'files': [
+        'share/pkgconfig/libclc.pc',
+        'include/clc/clc.h',
+    ],
+    'dirs': ['include/clc', 'share/clc'],
+}
+
+moduleclass = 'lib'
diff --git a/easybuild/easyconfigs/o/OpenGL/OpenGL-2025.09-GCCcore-14.3.0.eb b/easybuild/easyconfigs/o/OpenGL/OpenGL-2025.09-GCCcore-14.3.0.eb
new file mode 100644
index 000000000000..f4499e232457
--- /dev/null
+++ b/easybuild/easyconfigs/o/OpenGL/OpenGL-2025.09-GCCcore-14.3.0.eb
@@ -0,0 +1,128 @@
+easyblock = 'Bundle'
+
+name = 'OpenGL'
+version = '2025.09'
+
+homepage = 'http://www.opengl.org/'
+description = """
+Open Graphics Library (OpenGL) is a cross-language, cross-platform application
+programming interface (API) for rendering 2D and 3D vector graphics.
+
+This module is a bundle of software required for OpenGL rendering.
+It provides Mesa as an open-source implementation of the OpenGL specification
+with software rendering and AMD GPU support, libglvnd for a vendor neutral
+dispatch layer for rendering with both NVIDIA GPUs & Mesa, Mesa-demos for
+sample applications, and GLU as an computer graphics library utilizing OpenGL.
+"""
+
+toolchain = {'name': 'GCCcore', 'version': '14.3.0'}
+
+builddependencies = [
+    ('binutils', '2.44'),
+    ('Bison', '3.8.2'),
+    ('CMake', '4.0.3'),
+    ('Mako', '1.3.10'),
+    ('Meson', '1.8.2'),
+    ('Ninja', '1.13.0'),
+    ('Python', '3.13.5'),
+    ('PyYAML', '6.0.2'),
+    ('flex', '2.6.4'),
+    ('expat', '2.7.1'),
+    ('glslang-SPIRV', '15.4.0'),
+    ('libclc', '20.1.8'),
+    ('libxml2', '2.14.3'),
+    ('pkgconf', '2.4.3'),
+]
+
+dependencies = [
+    ('LLVM', '20.1.8'),
+    ('Wayland', '1.24.0'),
+    ('X11', '20250608'),
+    ('elfutils', '0.193'),
+    ('libdrm', '2.4.125'),
+    ('libunwind', '1.8.2'),
+    ('nettle', '3.10.2'),
+    ('zlib', '1.3.1'),
+]
+
+default_easyblock = 'MesonNinja'
+
+local_pkg_config = 'export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:%(installdir)s/lib/pkgconfig && '
+local_pkg_config += 'export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:%(installdir)s/lib64/pkgconfig && '
+
+local_mesa_configopts = "-Dplatforms=x11,wayland -Dvulkan-drivers='swrast,amd' -Dvulkan-layers='device-select' "
+local_mesa_configopts += "-Dllvm=enabled -Dshared-llvm=enabled -Dlibunwind=enabled -Degl=enabled -Dglvnd=enabled "
+local_mesa_configopts += "-Dglx=auto -Dgbm=enabled -Dgles1=enabled -Dgles2=enabled -Dgallium-drivers=llvmpipe,radeonsi "
+local_mesa_configopts += "-Dvideo-codecs=vc1dec,h264dec,h264enc,h265dec,h265enc,av1dec,av1enc,vp9dec "
+
+components = [
+    ('libglvnd', '1.7.0', {
+        'source_urls': ['https://gitlab.freedesktop.org/glvnd/libglvnd/-/archive/v%(version)s/'],
+        'sources': ['%(name)s-v%(version)s.tar.gz'],
+        'checksums': ['2b6e15b06aafb4c0b6e2348124808cbd9b291c647299eaaba2e3202f51ff2f3d'],
+        'start_dir': '%(namelower)s-v%(version)s',
+    }),
+    ('Mesa', '25.2.2', {
+        'easyblock': 'EB_Mesa',
+        'source_urls': [
+            'https://archive.mesa3d.org/',
+            'https://archive.mesa3d.org/older-versions/%(version_major)s.x/',
+        ],
+        'sources': [SOURCELOWER_TAR_XZ],
+        'checksums': ['43d7abcd4aa8049d8fd75538344a374104765e81e17b4a6314cee2c0160e4412'],
+        'start_dir': '%(namelower)s-%(version)s',
+        'preconfigopts': local_pkg_config,
+        'configopts': local_mesa_configopts,
+    }),
+    ('libGLU', '9.0.3', {
+        'source_urls': ['https://archive.mesa3d.org/glu/'],
+        'sources': ['glu-%(version)s.tar.xz'],
+        'checksums': ['bd43fe12f374b1192eb15fe20e45ff456b9bc26ab57f0eee919f96ca0f8a330f'],
+        'start_dir': 'glu-%(version)s',
+        'preconfigopts': local_pkg_config,
+    }),
+    ('Mesa-demos', '9.0.0', {
+        'source_urls': ['https://archive.mesa3d.org/demos/'],
+        'sources': [SOURCELOWER_TAR_XZ],
+        'checksums': ['3046a3d26a7b051af7ebdd257a5f23bfeb160cad6ed952329cdff1e9f1ed496b'],
+        'start_dir': '%(namelower)s-%(version)s',
+        'preconfigopts': local_pkg_config,
+        'configopts': ' -D osmesa=disabled -D wayland=disabled',
+    }),
+]
+
+postinstallcmds = [
+    'cd %(installdir)s/lib && ln -sf libGL.so.1.7.0 libGL.so.1',
+    'cd %(installdir)s/lib && ln -sf libGLX_mesa.so.0 libGLX_indirect.so.0',
+]
+
+modextrapaths = {
+    '__EGL_VENDOR_LIBRARY_DIRS': [
+        '/etc/glvnd/egl_vendor.d',
+        '/usr/share/glvnd/egl_vendor.d',
+        'share/glvnd/egl_vendor.d/',
+    ],
+    'VK_ADD_DRIVER_FILES': 'share/vulkan/icd.d/',
+    'VK_ADDITIONAL_IMPLICIT_LAYER_PATH_ENV_VAR': 'share/vulkan/implicit_layer.d/',
+    'VK_ADDITIONAL_EXPLICIT_LAYER_PATH_ENV_VAR': 'share/vulkan/explicit_layer.d/',
+}
+
+modextravars = {
+    'EGL_PLATFORM': 'surfaceless',
+    'EGL_LOG_LEVEL': 'fatal',
+    'KNOB_MAX_WORKER_THREADS': '65535',
+}
+
+sanity_check_all_components = True
+sanity_check_paths = {
+    'files': [
+        'lib/libEGL_mesa.%s' % SHLIB_EXT, 'lib/libGLESv1_CM.%s' % SHLIB_EXT,
+        'lib/libGLESv2.%s' % SHLIB_EXT, 'include/GL/glext.h',
+        'include/GL/glx.h', 'include/GL/gl.h', 'include/GL/glxext.h',
+        'include/GLES/gl.h', 'include/GLES2/gl2.h', 'include/GLES3/gl3.h',
+        'lib/libOpenGL.%s' % SHLIB_EXT,
+    ],
+    'dirs': []
+}
+
+moduleclass = 'vis'