A3ESimpleOSC for C#, version 0.1
https://github.com/lyuma/Av3Emulator/blob/master/Runtime/Scripts/A3ESimpleOSC.cs (MIT license)
Vim.Math3D
https://github.com/vimaec/Math3D (MIT license)
OpenVR API
https://github.com/ValveSoftware/openvr (BSD-3-Clause license)
https://github.com/ImGuiNET/ImGui.NET (MIT license)
Some answer found on Google by thoobes @ Unity Forums
https://forum.unity.com/threads/rotation-order.13469/#post-2493593
Some answer found on Google by Luke Hutchison @ Math.StackExchange
Some answer found on Google by Joel Harkes @ StackOverflow
Noto Sans Japanese font
https://fonts.google.com/noto/specimen/Noto+Sans+JP (SIL Open Font License)