diff --git a/easyconfigs/c/CasADi/CasADi-3.7.0-foss-2024a-MATLAB-2024a-r6.eb b/easyconfigs/c/CasADi/CasADi-3.7.0-foss-2024a-MATLAB-2024a-r6.eb
new file mode 100644
index 00000000..0765e948
--- /dev/null
+++ b/easyconfigs/c/CasADi/CasADi-3.7.0-foss-2024a-MATLAB-2024a-r6.eb
@@ -0,0 +1,34 @@
+easyblock = 'CMakeMake'
+
+name = 'CasADi'
+version = '3.7.0'
+versionsuffix = '-MATLAB-2024a-r6'
+
+homepage = 'https://web.casadi.org/'
+description = """CasADi is an open-source tool for nonlinear optimization and algorithmic differentiation."""
+
+toolchain = {'name': 'foss', 'version': '2024a'}
+
+github_account = 'casadi'
+source_urls = [GITHUB_LOWER_SOURCE]
+sources = ['%(version)s.tar.gz']
+checksums = ['946b1e5d4360715d5972ac4fcbc0e5375f934f412a670b402359ee2e1ea7bb3a']
+
+builddependencies = [
+    ('CMake', '3.29.3'),
+    ('SWIG', '20180415', '-MATLAB'),
+]
+
+dependencies = [
+    ('Ipopt', '3.14.17'),
+    ('MATLAB', '2024a-r6', '', SYSTEM),
+]
+
+sanity_check_paths = {
+    'files': ['lib/libcasadi.%s' % SHLIB_EXT],
+    'dirs': ['include'],
+}
+
+configopts = "-DWITH_IPOPT=ON -DWITH_MATLAB=ON -DWITH_THREAD=ON"
+
+moduleclass = 'tools'
diff --git a/easyconfigs/c/ColPack/ColPack-20180108-GCCcore-13.3.0.eb b/easyconfigs/c/ColPack/ColPack-20180108-GCCcore-13.3.0.eb
new file mode 100644
index 00000000..4a82b30b
--- /dev/null
+++ b/easyconfigs/c/ColPack/ColPack-20180108-GCCcore-13.3.0.eb
@@ -0,0 +1,25 @@
+easyblock = 'CMakeMake'
+
+name = 'ColPack'
+version = '20180108'
+local_commit = '72f691e91d59e8eb2123f258e67a4ddc72d105ee'
+
+homepage = 'https://github.com/opensim-org/ColPack'
+description = """ColPack is a package comprising of implementations of algorithms for the specialized vertex coloring problems discussed in the previous section as well as algorithms for a variety of related supporting tasks in derivative computation."""
+
+toolchain = {'name': 'GCCcore', 'version': '13.3.0'}
+
+source_urls = ['https://github.com/opensim-org/colpack/archive/']
+sources = [{'download_filename': '%s.zip' % local_commit, 'filename': '%(name)s-%(version)s.zip'}]
+checksums = ['7f2d707e69cb02113e3bf83be47db7d4a36351ac474756e33d2a67a480617bbf']
+
+builddependencies = {
+    ('CMake', '3.29.3'),
+}
+
+sanity_check_paths = {
+    'files': ['lib/libColPack.%s' % SHLIB_EXT],
+    'dirs': ['include'],
+}
+
+moduleclass = 'math'
diff --git a/easyconfigs/o/OpenSim/OpenSim-4.5.2-foss-2024a-MATLAB-2024a-r6.eb b/easyconfigs/o/OpenSim/OpenSim-4.5.2-foss-2024a-MATLAB-2024a-r6.eb
new file mode 100644
index 00000000..a18e7270
--- /dev/null
+++ b/easyconfigs/o/OpenSim/OpenSim-4.5.2-foss-2024a-MATLAB-2024a-r6.eb
@@ -0,0 +1,66 @@
+easyblock = 'CMakeMake'
+
+name = 'OpenSim'
+version = '4.5.2'
+versionsuffix = '-MATLAB-2024a-r6'
+
+homepage = 'https://github.com/opensim-org/opensim-core'
+description = """OpenSim is software that lets users develop models of musculoskeletal structures and create dynamic simulations of movement"""
+
+toolchain = {'name': 'foss', 'version': '2024a'}
+
+source_urls = ['https://github.com/opensim-org/opensim-core/archive/']
+sources = ['%(version)s.tar.gz']
+checksums = ['53c7c477aeef334109d7ea991251c1f680777d42e59d878fef808ad6d28a98f2']
+patches = [
+    'OpenSim-%(version)s_fix-docopt-includes-link.patch',
+    'OpenSim-%(version)s_CMake-grab-correct-libraries.patch',
+]
+
+builddependencies = [
+    ('CMake', '3.29.3'),
+    ('pkgconf', '2.2.0'),
+    ('Doxygen', '1.11.0'),
+    ('git', '2.45.1'),
+    ('spdlog', '1.4.1'),  # OpenSim needs this very old version
+    ('Catch2', '3.8.0'),
+    ('SWIG', '4.2.1'),
+]
+
+dependencies = [
+    ('EZC3D', '1.6.0'),
+    ('MATLAB', '2024a-r6', '', SYSTEM),
+    ('Simbody', '3.8'),
+    ('CasADi', '3.7.0', '-MATLAB-2024a-r6'),
+    ('ColPack', '20180108'),
+    ('Eigen', '3.4.0'),
+    ('ADOL-C', '2.7.2'),
+    ('Java', '8', '', SYSTEM), # version used by MATLAB
+    ('docopt.cpp', '0.6.3-400e6dd'),
+]
+
+
+# An old CMake module for MATLAB is included in the source which does not
+# handle recent MATLAB versions correctly. Remove it and realy on the CMake
+# module for MATLAB in the CMake installation instead.
+preconfigopts = 'rm ../opensim-core-%(version)s/cmake/FindMatlab.cmake && '
+
+# In newer versions of CasADi the target casadi has been replaced with casadi::casadi
+preconfigopts += "sed -i 's/get_target_property(CASADI_LIBRARY_LOCATION casadi LOCATION)/set(CASADI_LIBRARY_LOCATION casadi::casadi)/' ../opensim-core-%(version)s/cmake/CMakeLists.txt && "
+
+configopts = ' -G"Unix Makefiles" -DOPENSIM_WITH_CASADI=on -DBUILD_JAVA_WRAPPING=on '
+configopts += '-DBUILD_PYTHON_WRAPPING=off -DOPENSIM_C3D_PARSER=ezc3d '
+configopts += '-DBUILD_TESTING=off -DOPENSIM_INSTALL_UNIX_FHS=off ' # Turn off unix FHS, otherwise default directories are used to store files
+configopts += '-DSWIG_DIR=${EBROOTSWIG} -DSIMBODY_HOME=${EBROOTSIMBODY} '
+configopts += '-DOPENSIM_WITH_TROPTER=off '
+
+sanity_check_paths = {
+    'files': ['bin/opensim-cmd'],
+    'dirs': ['sdk'],
+}
+
+modextrapaths = {
+    'CPATH': ['sdk/include', 'sdk/Simbody/include/simbody'],
+}
+
+moduleclass = 'tools'
diff --git a/easyconfigs/o/OpenSim/OpenSim-4.5.2_CMake-grab-correct-libraries.patch b/easyconfigs/o/OpenSim/OpenSim-4.5.2_CMake-grab-correct-libraries.patch
new file mode 100644
index 00000000..17f331a7
--- /dev/null
+++ b/easyconfigs/o/OpenSim/OpenSim-4.5.2_CMake-grab-correct-libraries.patch
@@ -0,0 +1,21 @@
+diff -ruN opensim-core-4.5.2.orig/CMakeLists.txt opensim-core-4.5.2/CMakeLists.txt
+--- opensim-core-4.5.2.orig/CMakeLists.txt	2025-04-11 23:34:24.000000000 +0200
++++ opensim-core-4.5.2/CMakeLists.txt	2025-10-29 12:03:22.195873250 +0100
+@@ -864,15 +864,10 @@
+ 
+             file(GLOB gfortran "${gcc_libdir}/../../../x86_64-linux-gnu/libgfortran*.so*")
+             file(GLOB quadmath "${gcc_libdir}/../../../x86_64-linux-gnu/libquadmath*.so*")
++	    file(GLOB ipoptlibs "${IPOPT_LIBDIR}/*.so*")
+ 
+             install(FILES
+-                ${IPOPT_LIBDIR}/libipopt.so.3.14.16
+-                ${IPOPT_LIBDIR}/libipopt.so.3
+-                ${IPOPT_LIBDIR}/libipopt.so
+-                ${IPOPT_LIBDIR}/libcoinmumps.so.3.0.5
+-                ${IPOPT_LIBDIR}/libcoinmumps.so.3
+-                ${IPOPT_LIBDIR}/libcoinmumps.so
+-                ${IPOPT_LIBDIR}/libmetis.so
++	        ${ipoptlibs}
+                 ${gfortran}
+                 ${quadmath}
+                 DESTINATION ${CMAKE_INSTALL_LIBDIR})
diff --git a/easyconfigs/s/SWIG/SWIG-20180415-GCCcore-13.3.0-MATLAB.eb b/easyconfigs/s/SWIG/SWIG-20180415-GCCcore-13.3.0-MATLAB.eb
new file mode 100644
index 00000000..c7ecc6a7
--- /dev/null
+++ b/easyconfigs/s/SWIG/SWIG-20180415-GCCcore-13.3.0-MATLAB.eb
@@ -0,0 +1,39 @@
+name = 'SWIG'
+version = '20180415'
+versionsuffix = '-MATLAB'
+local_commit = 'cd3f6c5fe9ed273fcc981dcae3e8b50d51529664'
+
+homepage = 'https://github.com/jaeandersson/swig/'
+description = """
+This specific version of SWIG supports MATLAB. SWIG is a software
+development tool that connects programs written in C and C++ with a variety of high-level programming languages.
+"""
+
+toolchain = {'name': 'GCCcore', 'version': '13.3.0'}
+toolchainopts = {'pic': True}
+
+source_urls = ['https://github.com/jaeandersson/swig/archive/']
+sources = [{'download_filename': '%s.zip' % local_commit, 'filename': '%(name)s-%(version)s.zip'}]
+checksums = ['b5ef6f988b97777c95e096ba20ff0b140b52b6330516a9070793b5af5644c63d']
+
+builddependencies = [
+    ('binutils', '2.42'),
+    ('Bison', '3.8.2'),
+]
+
+dependencies = [
+    ('zlib', '1.3.1'),
+    ('PCRE', '8.45'),
+]
+
+preconfigopts = 'sh autogen.sh && '
+configopts = '--without-alllang --with-boost=no --with-matlab'
+
+sanity_check_paths = {
+    'files': ['bin/swig'],
+    'dirs': ['share'],
+}
+
+sanity_check_commands = ['swig -help'] 
+
+moduleclass = 'devel'