Nothing big but I wrote a custom Windows/DirectX backend for Dear ImGui.
On one hand to just have a native Odin backend. But also to serve as an easy introduction to others who would like to integrate imgui into their own renderers/OS layers, like I used to do. It doesn't cover all edge cases and features like the official backends, but that let me keep things simple.
https://github.com/alektron/imgui-odin-backends