diff --git a/.reuse/dep5 b/.reuse/dep5
index e75dab50d..8616e6669 100644
--- a/.reuse/dep5
+++ b/.reuse/dep5
@@ -15,7 +15,7 @@ License: CC0-1.0
 Comment: Prevents needing a license header per fragment between releases.
 
 Files: src/external/flexkalman/.clang-format
-       src/external/flexkalman/README.md
+       src/external/flexkalman/flexkalman/README.md
 Copyright: 2015, 2016, Sensics, Inc.
  2019, Collabora, Ltd.
 License: Apache-2.0
@@ -24,17 +24,79 @@ Comment: Copyright statement and license identifier missing.
 Files: src/external/cjson/*
 Copyright: 2009-2017, Dave Gamble and cJSON contributors
 License: MIT
-Comment: SPDX-Licence-Identifier missing.
+Comment: SPDX-License-Identifier missing.
  Debian calls this "Expat" for clarity.
 
-Files: src/external/openxr_includes/*
-Copyright: 2017-2019, The Khronos Group Inc.
-License: Apache-2.0
-Comment: SPDX-Licence-Identifier missing.
+Files: src/external/Catch2/catch/*
+Copyright: 2020, Two Blue Cubes Ltd.
+License: BSL-1.0
+Comment: SPDX-License-Identifier missing.
 
 Files: src/external/openxr_includes/loader_interfaces.h
 Copyright: 2017, LunarG, Inc.
  2017, Valve Corporation
  2017-2019, The Khronos Group Inc.
 License: Apache-2.0
-Comment: SPDX-Licence-Identifier missing.
+Comment: SPDX-License-Identifier missing.
+
+
+Files: src/external/jnipp/*
+Copyright: 2016-2020, Mitchell Dowd
+ 2020, Collabora, Ltd.
+License: MIT
+Comment: SPDX-License-Identifier missing.
+ Debian calls this "Expat" for clarity.
+
+Files: src/external/hungarian/*
+Copyright: 2016, mcximing
+License: BSD-2-Clause
+Comment: SPDX-License-Identifier missing.
+
+Files: src/external/imgui/imgui*
+ src/external/imgui/imconfig.h
+Copyright: 2014-2020, Omar Cornut
+License: MIT
+Comment: Copyright statement and license identifier missing.
+ Debian calls this "Expat" for clarity.
+
+Files: src/external/imgui/implot*
+Copyright: 2020, Evan Pezent
+License: MIT
+Comment: SPDX-License-Identifier missing.
+ Debian calls this "Expat" for clarity.
+
+Files: src/external/imgui/cim*
+Copyright: 2015, Stephan Dilly
+License: MIT
+Comment: Copyright statement and license identifier missing.
+ Debian calls this "Expat" for clarity.
+
+Files: src/external/imgui/imstb*
+Copyright: 2017, Sean Barrett
+License: MIT OR Unlicense
+Comment: SPDX-License-Identifier missing.
+
+Files: src/external/glad/include/EGL/eglplatform.h
+Copyright: 2007-2016, The Khronos Group Inc.
+License: LicenseRef-Khronos-Free-Use-License-for-Software-and-Documentation
+Comment: SPDX-License-Identifier missing.
+
+Files:  src/external/glad/include/KHR/khrplatform.h
+Copyright: 2008-2018, The Khronos Group Inc.
+License: LicenseRef-Khronos-Free-Use-License-for-Software-and-Documentation
+Comment: SPDX-License-Identifier missing.
+
+Files: src/external/glad/include/glad/egl.h
+Copyright: 2013-2020, The Khronos Group, Inc.
+License: Apache-2.0
+Comment: This is generated from the specification XML (licensed as above) by GLAD2.
+
+Files: src/external/glad/include/glad/gl.h
+Copyright: 2013-2020, The Khronos Group, Inc.
+License: Apache-2.0
+Comment: This is generated from the specification XML (licensed as above) by GLAD2.
+
+Files:  src/external/glad/src/*
+Copyright: 2013-2020, David Herberth
+License: MIT
+Comment: SPDX-License-Identifier missing.
diff --git a/LICENSES/LicenseRef-Khronos-Free-Use-License-for-Software-and-Documentation.txt b/LICENSES/LicenseRef-Khronos-Free-Use-License-for-Software-and-Documentation.txt
new file mode 100644
index 000000000..31ca8feb5
--- /dev/null
+++ b/LICENSES/LicenseRef-Khronos-Free-Use-License-for-Software-and-Documentation.txt
@@ -0,0 +1,18 @@
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and/or associated documentation files (the
+"Materials"), to deal in the Materials without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Materials, and to
+permit persons to whom the Materials are furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Materials.
+
+THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
diff --git a/src/external/hungarian/README.txt b/src/external/hungarian/README.txt
index d58e6358c..4a0cd5c60 100644
--- a/src/external/hungarian/README.txt
+++ b/src/external/hungarian/README.txt
@@ -5,3 +5,4 @@ This is a C++ wrapper with slight modification of a hungarian algorithm implemen
 The original code is a few mex-functions for use in MATLAB, found here: 
 http://www.mathworks.com/matlabcentral/fileexchange/6543-functions-for-the-rectangular-assignment-problem
 
+Upstream source: https://github.com/mcximing/hungarian-algorithm-cpp