diff --git a/external/cmake-files/Boost.cmake b/external/cmake-files/Boost.cmake
new file mode 100644
index 000000000..48dad5e6f
--- /dev/null
+++ b/external/cmake-files/Boost.cmake
@@ -0,0 +1,36 @@
+set(BOOST_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
+function(GetBoost)
+	find_path(BOOST_DIR NAMES boost PATHS ${BOOST_CMAKE_DIR}/../_deps/boost-src)
+
+	if (NOT BOOST_DIR) 
+  
+    set(BOOST_URL "https://boostorg.jfrog.io/artifactory/main/release/1.76.0/source/boost_1_76_0.tar.bz2" CACHE STRING "Boost download URL")
+    set(BOOST_URL_SHA256 "f0397ba6e982c4450f27bf32a2a83292aba035b827a5623a14636ea583318c41" CACHE STRING "Boost download URL SHA256 checksum")
+
+    include(FetchContent)
+    set(FETCHCONTENT_BASE_DIR "${BOOST_CMAKE_DIR}/../_deps")
+    FetchContent_Declare(
+      Boost
+      URL ${BOOST_URL}
+      URL_HASH SHA256=${BOOST_URL_SHA256}
+    )
+    FetchContent_GetProperties(Boost)
+
+    if(NOT Boost_POPULATED)
+      message(STATUS "Fetching Boost")
+      FetchContent_Populate(Boost)
+      message(STATUS "Fetching Boost - done")
+      set(BOOST_DIR ${boost_SOURCE_DIR})
+    endif()
+
+    message(STATUS "Using downloaded Boost library at ${BOOST_DIR}")
+
+  else ()
+    message(STATUS "Boost Library found: ${BOOST_DIR}")
+
+  endif()
+
+  include_directories(${BOOST_DIR})
+  include_directories(${BOOST_DIR}/boost)
+
+endfunction()
diff --git a/external/cmake-files/Eigen.cmake b/external/cmake-files/Eigen.cmake
new file mode 100644
index 000000000..974a6f184
--- /dev/null
+++ b/external/cmake-files/Eigen.cmake
@@ -0,0 +1,32 @@
+set(EIGEN_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
+function(GetEigen)
+  find_path(EIGEN_DIR NAMES Eigen PATHS ${EIGEN_CMAKE_DIR}/../_deps/eigen-src)
+
+  if (NOT EIGEN_DIR) 
+    include(FetchContent)
+    set(FETCHCONTENT_BASE_DIR "${EIGEN_CMAKE_DIR}/../_deps")
+    FetchContent_Declare(
+      eigen
+      GIT_REPOSITORY https://gitlab.com/libeigen/eigen.git
+      GIT_TAG 3.4.0
+    )
+
+    FetchContent_GetProperties(eigen)
+    
+    if(NOT eigen_POPULATED)
+      message(STATUS "Eigen library not found locally, downloading it.")
+      FetchContent_Populate(eigen)
+    endif()
+
+    set(EIGEN_DIR ${eigen_SOURCE_DIR})
+    message(STATUS "Using downloaded Eigen library at: ${EIGEN_DIR}")
+
+  else ()
+
+    message(STATUS "Eigen Library found: ${EIGEN_DIR}")
+
+  endif()
+
+  include_directories(${EIGEN_DIR})
+
+endfunction()
diff --git a/external/cmake-files/LPSolve.cmake b/external/cmake-files/LPSolve.cmake
new file mode 100644
index 000000000..b3f3cf98b
--- /dev/null
+++ b/external/cmake-files/LPSolve.cmake
@@ -0,0 +1,32 @@
+set(LP_SOLVE_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
+function(GetLPSolve)
+  find_path(LP_SOLVE_DIR NAMES lpsolve.h PATHS ${LP_SOLVE_CMAKE_DIR}/../_deps/lpsolve-src)
+
+  if (NOT LP_SOLVE_DIR)
+      include(FetchContent)
+      set(FETCHCONTENT_BASE_DIR "${LP_SOLVE_CMAKE_DIR}/../_deps")
+      FetchContent_Declare(
+          lpsolve
+          URL https://webwerks.dl.sourceforge.net/project/lpsolve/lpsolve/5.5.2.11/lp_solve_5.5.2.11_source.tar.gz
+          URL_HASH MD5=a829a8d9c60ff81dc72ff52363703886
+      )
+
+      FetchContent_GetProperties(lpsolve)
+
+      if(NOT lpsolve_POPULATED)
+          message(STATUS "lp_solve library not found locally, downloading it.")
+          FetchContent_Populate(lpsolve)
+      endif()
+
+      set(LP_SOLVE_DIR "${lpsolve_SOURCE_DIR}")
+      message(STATUS "Using downloaded lp_solve at: ${LP_SOLVE_DIR}")
+
+  else()
+
+      message(STATUS "lp_solve library found: ${LP_SOLVE_DIR}")
+
+  endif()
+
+  include_directories(${LP_SOLVE_DIR})
+
+endfunction()
diff --git a/external/cmake-files/QD.cmake b/external/cmake-files/QD.cmake
new file mode 100644
index 000000000..b65e4f51c
--- /dev/null
+++ b/external/cmake-files/QD.cmake
@@ -0,0 +1,54 @@
+set(QD_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
+function(GetQD)
+  find_path(QD_DIR NAMES config.h PATHS ${QD_CMAKE_DIR}/../_deps/qd-src/)
+
+  if (NOT QD_DIR)
+      include(FetchContent)
+      set(FETCHCONTENT_BASE_DIR "${QD_CMAKE_DIR}/../_deps")
+      FetchContent_Declare(
+          qd
+          URL https://www.davidhbailey.com/dhbsoftware/qd-2.3.23.tar.gz
+      )
+
+      FetchContent_GetProperties(qd)
+
+      if(NOT qd_POPULATED)
+          message(STATUS "QD library not found locally, downloading it.")
+          FetchContent_Populate(qd)
+      endif()
+
+      set(QD_DIR "${qd_SOURCE_DIR}")
+      message(STATUS "Using downloaded QD at: ${QD_DIR}")
+
+  else()
+
+      message(STATUS "QD library found: ${QD_DIR}")
+
+  endif()
+
+  include_directories(BEFORE "${QD_DIR}/include/")
+  message(STATUS "configuring the QD library")
+  execute_process(
+    COMMAND ./configure
+    WORKING_DIRECTORY ${QD_DIR}
+    OUTPUT_FILE CMD_OUTPUT
+    RESULT_VARIABLE EXECUTE
+  )
+  if(NOT ${EXECUTE} EQUAL "0")
+    message(FATAL_ERROR "./configure QD library failed")
+  endif()
+
+  execute_process(
+      COMMAND make
+      WORKING_DIRECTORY ${QD_DIR}
+      OUTPUT_FILE qd_compilation.txt
+      RESULT_VARIABLE EXECUTE_MAKE
+  )
+
+  if(NOT ${EXECUTE_MAKE} EQUAL "0")
+    message(FATAL_ERROR "building the QD library failed")
+  endif()
+
+  find_library(QD_LIB NAMES libqd.a PATHS "${QD_DIR}/src/.libs")
+
+endfunction()