The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.
dear-imgui-rs is a Rust bindings ecosystem for Dear ImGui, featuring docking support, WGPU/GL/Vulkan backends, and a rich set of extensions (ImPlot/ImPlot3D, ImGuizmo/ImGuIZMO.quat, ImNodes, imgui-node-editor, ImGui Test Engine, file browser, reflection-based UI).