diff --git a/.github/workflows/c_apps.sh b/.github/workflows/c_apps.sh
index d146c600..ee8284ed 100755
--- a/.github/workflows/c_apps.sh
+++ b/.github/workflows/c_apps.sh
@@ -18,6 +18,8 @@ set -x
 set -e
 set -u
 
+# Old bash versions can't expand empty arrays, so we always include at least this option.
+CMAKE_OPTIONS=("-DCMAKE_OSX_ARCHITECTURES=x86_64")
 
 help | head
 
@@ -38,8 +40,20 @@ case "$(uname)" in
   df -h
   ;;
 
+"Darwin")
+  NINJA_OS="mac"
+  SDKROOT=$(xcrun --show-sdk-path)
+  export SDKROOT
+  ;;
+
+"MINGW"*|"MSYS_NT"*)
+  NINJA_OS="win"
+  CMAKE_OPTIONS+=("-DCMAKE_C_COMPILER=cl.exe" "-DCMAKE_CXX_COMPILER=cl.exe")
+  choco install zip
+  ;;
+
 *)
-  echo "Unknown OS: only Linux is supported for the dev_build workflow"
+  echo "Unknown OS"
   exit 1
   ;;
 esac
@@ -58,80 +72,108 @@ popd
 
 DREDD_ROOT=$(pwd)
 
-export PATH="${DREDD_ROOT}/third_party/clang+llvm/bin:$PATH"
+case "$(uname)" in
+"Linux")
+  # On Linux, build Dredd using the prebuilt version of Clang that has been downloaded
+  export PATH="${DREDD_ROOT}/third_party/clang+llvm/bin:$PATH"
+  export CC=clang
+  export CXX=clang++
+  which ${CC}
+  which ${CXX}
+  ;;
 
-export CC=clang
-export CXX=clang++
+"Darwin")
+  ;;
 
-which ${CC}
-which ${CXX}
+"MINGW"*|"MSYS_NT"*)
+  ;;
+
+*)
+  echo "Unknown OS"
+  exit 1
+  ;;
+esac
 
 mkdir -p build
 pushd build
-  cmake -G Ninja .. -DCMAKE_BUILD_TYPE=Debug
-  cmake --build . --config Debug
-  cmake -DCMAKE_INSTALL_PREFIX=./install -DBUILD_TYPE=Debug -P cmake_install.cmake
+  cmake -G Ninja .. -DCMAKE_BUILD_TYPE="${CONFIG}" "${CMAKE_OPTIONS[@]}"
+  cmake --build . --config "${CONFIG}"
+  cmake -DCMAKE_INSTALL_PREFIX=./install -DBUILD_TYPE="${CONFIG}" -P cmake_install.cmake
 popd
 
 # Check that dredd works on some projects
 DREDD_EXECUTABLE="${DREDD_ROOT}/third_party/clang+llvm/bin/dredd"
 cp "${DREDD_ROOT}/build/src/dredd/dredd" "${DREDD_EXECUTABLE}"
 
-echo "Curl"
-date
-
-git clone https://github.com/curl/curl.git
-pushd curl
-  git reset --hard curl-7_84_0
-  mkdir build
-  pushd build
-    cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ..
-  popd
-  FILES=()
-  for f in $(find src -name "*.c")
-  do
-      FILES+=("${f}")
-  done
-
-  "${DREDD_EXECUTABLE}" --mutation-info-file temp.json -p "build/compile_commands.json" "${FILES[@]}"
-  pushd build
-    ninja
-    # TODO: run some tests
+case "$(uname)" in
+"Linux"|"MINGW"*|"MSYS_NT"*)
+  echo "Curl"
+  date
+
+  git clone https://github.com/curl/curl.git
+  pushd curl
+    git reset --hard curl-7_84_0
+    mkdir build
+    pushd build
+      cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ..
+    popd
+    FILES=()
+    for f in $(find src -name "*.c")
+    do
+        FILES+=("${f}")
+    done
+
+    "${DREDD_EXECUTABLE}" --mutation-info-file temp.json -p "build/compile_commands.json" "${FILES[@]}"
+    pushd build
+      ninja
+      # TODO: run some tests
+    popd
   popd
-popd
+  ;;
 
-echo "zstd"
-date
+*)
+  ;;
+esac
 
-git clone https://github.com/facebook/zstd.git
-pushd zstd
-  git reset --hard v1.4.10
-  mkdir temp
-  pushd temp
-    # Generate a compilation database
-    cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ../build/cmake
+case "$(uname)" in
+"Linux"|"Darwin")
+  echo "zstd"
+  date
+
+  git clone https://github.com/facebook/zstd.git
+  pushd zstd
+    git reset --hard v1.4.10
+    mkdir temp
+    pushd temp
+      # Generate a compilation database
+      cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ../build/cmake
+    popd
+    # Build non-mutated zstd
+    CFLAGS=-O0 make zstd-release
+    # Use the compiled zstd binary as a target for compression, and compress it.
+    cp ./programs/zstd tocompress
+    ./zstd tocompress -o normal
+    # Mutate all the source files in the lib directory of zstd
+    FILES=()
+    for f in $(find lib -name "*.c")
+    do
+      FILES+=("${f}")
+    done
+    "${DREDD_EXECUTABLE}" --mutation-info-file temp.json -p "temp/compile_commands.json" "${FILES[@]}"
+    # Build mutated zstd
+    make clean
+    CFLAGS=-O0 make zstd-release
+    # Use it to compress the original (non-mutated) zstd binary
+    ./zstd tocompress -o mutated
+    # The results obtained using the original and mutated versions of zstd should
+    # be identical, since no mutations were enabled.
+    diff normal mutated
   popd
-  # Build non-mutated zstd
-  CFLAGS=-O0 make zstd-release
-  # Use the compiled zstd binary as a target for compression, and compress it.
-  cp ./programs/zstd tocompress
-  ./zstd tocompress -o normal
-  # Mutate all the source files in the lib directory of zstd
-  FILES=()
-  for f in $(find lib -name "*.c")
-  do
-    FILES+=("${f}")
-  done
-  "${DREDD_EXECUTABLE}" --mutation-info-file temp.json -p "temp/compile_commands.json" "${FILES[@]}"
-  # Build mutated zstd
-  make clean
-  CFLAGS=-O0 make zstd-release
-  # Use it to compress the original (non-mutated) zstd binary
-  ./zstd tocompress -o mutated
-  # The results obtained using the original and mutated versions of zstd should
-  # be identical, since no mutations were enabled.
-  diff normal mutated
-popd
+  ;;
+
+*)
+  ;;
+esac
 
 echo "Finished"
 date
diff --git a/.github/workflows/c_apps.yml b/.github/workflows/c_apps.yml
index b70f57a6..62f51186 100644
--- a/.github/workflows/c_apps.yml
+++ b/.github/workflows/c_apps.yml
@@ -24,9 +24,13 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-22.04
+          - macOS-latest
+          - windows-latest
         config:
           - Release
+        include:
+          - os: ubuntu-22.04
+            config: Debug
 
     runs-on: ${{ matrix.os }}
     env:
@@ -69,3 +73,12 @@ jobs:
         run: |
           .github/workflows/c_apps.sh
         shell: bash
+        if: |
+          !startsWith(matrix.os, 'windows')
+      - name: build_step_windows
+        run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          "C:\Program Files\Git\bin\bash.EXE" --noprofile --norc -e -o pipefail .github/workflows/c_apps.sh
+        shell: cmd
+        if: |
+          startsWith(matrix.os, 'windows')
diff --git a/.github/workflows/cxx_apps.sh b/.github/workflows/cxx_apps.sh
index 73204847..020c1fbd 100755
--- a/.github/workflows/cxx_apps.sh
+++ b/.github/workflows/cxx_apps.sh
@@ -18,6 +18,8 @@ set -x
 set -e
 set -u
 
+# Old bash versions can't expand empty arrays, so we always include at least this option.
+CMAKE_OPTIONS=("-DCMAKE_OSX_ARCHITECTURES=x86_64")
 
 help | head
 
@@ -38,8 +40,20 @@ case "$(uname)" in
   df -h
   ;;
 
+"Darwin")
+  NINJA_OS="mac"
+  SDKROOT=$(xcrun --show-sdk-path)
+  export SDKROOT
+  ;;
+
+"MINGW"*|"MSYS_NT"*)
+  NINJA_OS="win"
+  CMAKE_OPTIONS+=("-DCMAKE_C_COMPILER=cl.exe" "-DCMAKE_CXX_COMPILER=cl.exe")
+  choco install zip
+  ;;
+
 *)
-  echo "Unknown OS: only Linux is supported for the dev_build workflow"
+  echo "Unknown OS"
   exit 1
   ;;
 esac
@@ -58,31 +72,78 @@ popd
 
 DREDD_ROOT=$(pwd)
 
-export PATH="${DREDD_ROOT}/third_party/clang+llvm/bin:$PATH"
+case "$(uname)" in
+"Linux")
+  # On Linux, build Dredd using the prebuilt version of Clang that has been downloaded
+  export PATH="${DREDD_ROOT}/third_party/clang+llvm/bin:$PATH"
+  export CC=clang
+  export CXX=clang++
+  which ${CC}
+  which ${CXX}
+  ;;
+
+"Darwin")
+  ;;
 
-export CC=clang
-export CXX=clang++
+"MINGW"*|"MSYS_NT"*)
+  ;;
 
-which ${CC}
-which ${CXX}
+*)
+  echo "Unknown OS"
+  exit 1
+  ;;
+esac
 
 mkdir -p build
 pushd build
-  cmake -G Ninja .. -DCMAKE_BUILD_TYPE=Debug
-  cmake --build . --config Debug
-  cmake -DCMAKE_INSTALL_PREFIX=./install -DBUILD_TYPE=Debug -P cmake_install.cmake
+  cmake -G Ninja .. -DCMAKE_BUILD_TYPE="${CONFIG}" "${CMAKE_OPTIONS[@]}"
+  cmake --build . --config "${CONFIG}"
+  cmake -DCMAKE_INSTALL_PREFIX=./install -DBUILD_TYPE="${CONFIG}" -P cmake_install.cmake
 popd
 
 # Check that dredd works on some projects
 DREDD_EXECUTABLE="${DREDD_ROOT}/third_party/clang+llvm/bin/dredd"
 cp "${DREDD_ROOT}/build/src/dredd/dredd" "${DREDD_EXECUTABLE}"
 
+case "$(uname)" in
+"Linux")
+  CMAKE_OPTIONS_FOR_COMPILING_MUTATED_CODE=("-DCMAKE_CXX_FLAGS=-w")
+  ;;
+
+"MINGW"*|"MSYS_NT"*)
+  # Dredd can lead to object files with many sections, which can be too much for MSVC's default settings.
+  # The /bigobj switch enables a larger number of sections.
+  CMAKE_OPTIONS_FOR_COMPILING_MUTATED_CODE=("-DCMAKE_CXX_FLAGS=\"/w /bigobj /EHsc\"")
+  ;;
+
+"Darwin")
+  # The Apple compiler does not use C++11 by default; Dredd requires at least this language version.
+  CMAKE_OPTIONS_FOR_COMPILING_MUTATED_CODE=("-DCMAKE_CXX_FLAGS=\"-w -std=c++11\"")
+  ;;
+
+*)
+  ;;
+esac
+
 echo "examples/simple/pi.cc: check that we can build the simple example"
 date
 
 ${DREDD_EXECUTABLE} --mutation-info-file temp.json examples/simple/pi.cc
-clang++ examples/simple/pi.cc -o examples/simple/pi
-diff <(./examples/simple/pi) <(echo "3.14159")
+case "$(uname)" in
+"Linux"|"Darwin")
+  clang++ -std=c++11 examples/simple/pi.cc -o examples/simple/pi
+  ;;
+
+"MINGW"*|"MSYS_NT"*)
+  cl examples/simple/pi.cc
+  mv pi.exe examples/simple/    
+  ;;
+
+*)
+  ;;
+esac
+
+diff --strip-trailing-cr <(./examples/simple/pi) <(echo "3.14159")
 
 echo "examples/math: check that the tests pass after mutating the library"
 date
@@ -90,7 +151,7 @@ date
 pushd examples/math
   mkdir build
   pushd build
-    cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ..
+    cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON "${CMAKE_OPTIONS_FOR_COMPILING_MUTATED_CODE[@]}" ..
     ../mutate.sh
     cmake --build .
     ./mathtest/mathtest
@@ -106,7 +167,7 @@ pushd SPIRV-Tools
   python3 utils/git-sync-deps
   mkdir build
   pushd build
-    cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DSPIRV_WERROR=OFF  -DCMAKE_CXX_FLAGS="-w" ..
+    cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DSPIRV_WERROR=OFF "${CMAKE_OPTIONS_FOR_COMPILING_MUTATED_CODE[@]}" ..
     # Build something minimal to ensure all header files get generated.
     ninja SPIRV-Tools-static
   popd
@@ -133,7 +194,7 @@ git clone --branch llvmorg-14.0.6 --depth 1 https://github.com/llvm/llvm-project
 pushd llvm-project
   mkdir build
   pushd build
-    cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_CXX_FLAGS="-w" ../llvm
+    cmake -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON "${CMAKE_OPTIONS_FOR_COMPILING_MUTATED_CODE[@]}" ../llvm
     # Build something minimal to ensure all header files get generated.
     ninja LLVMCore
   popd
diff --git a/.github/workflows/cxx_apps.yml b/.github/workflows/cxx_apps.yml
index 85676d85..1bd3d975 100644
--- a/.github/workflows/cxx_apps.yml
+++ b/.github/workflows/cxx_apps.yml
@@ -24,9 +24,13 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-22.04
+          - macOS-latest
+          - windows-latest
         config:
           - Release
+        include:
+          - os: ubuntu-22.04
+            config: Debug
 
     runs-on: ${{ matrix.os }}
     env:
@@ -69,3 +73,12 @@ jobs:
         run: |
           .github/workflows/cxx_apps.sh
         shell: bash
+        if: |
+          !startsWith(matrix.os, 'windows')
+      - name: build_step_windows
+        run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          "C:\Program Files\Git\bin\bash.EXE" --noprofile --norc -e -o pipefail .github/workflows/cxx_apps.sh
+        shell: cmd
+        if: |
+          startsWith(matrix.os, 'windows')