Lots of readers have shared their implementations from the Ray Tracing In One Weekend series. Feel free to add your own!

• C# -- https://github.com/ronnieholm/Ray-tracing-in-one-weekend-CSharp
• F# -- https://github.com/ronnieholm/Ray-tracing-in-one-weekend-FSharp
• C -- https://github.com/Morozov-5F/raytracing-weekend
• C -- https://github.com/define-private-public/PSRayTracing, https://github.com/LiuZengqiang/RayTracingInOneWeekend
• Clojure -- https://github.com/Clojure2D/clojure2d-examples/tree/master/src/rt_in_weekend, https://github.com/Clojure2D/clojure2d-examples/tree/master/src/rt4/in_one_weekend (second approach)
• Common Lisp -- https://github.com/jstoddard/rtiow
• Cuda -- https://github.com/rogerallen/raytracinginoneweekendincuda (blog post: https://devblogs.nvidia.com/accelerated-ray-tracing-cuda/), https://github.com/D-K-E/cuda-raytracer, https://github.com/LiuZengqiang/RayTracingInOneWeekendCUDA
• Go -- https://github.com/i-am-g2/Tr, https://github.com/DanielPettersson/solstrale, https://github.com/kris-gaudel/go-tracer
• Java -- https://github.com/2149495141/RayTracingInJava
• Julia -- https://github.com/claforte/RayTracingWeekend.jl
• Julia -- https://github.com/lawless-m/ShirleyRenderer.jl - competitive with C version, also supports multi-threads
• Kotlin -- https://github.com/time4tea/raytrace-in-a-weekend-kotlin
• OCaml -- https://github.com/LesleyLai/ocamlpt, https://github.com/MisakaCenter/RayTracer.ml
• OpenCL -- https://github.com/D-K-E/opencl-raytracer-oneweekend
• Metal -- https://github.com/eoinroe/MTLRaytracing
• Python with numpy -- https://github.com/alfiopuglisi/raytrace_weekend_numpy (jupyter notebook: https://github.com/alfiopuglisi/raytrace_weekend_numpy/blob/master/raytrace_weekend_numpy.ipynb)
• Python -- https://github.com/gkmngrgn/rayt/tree/master/rayt-python
• Rayground -- https://www.rayground.com/view/2hucHmtxldY
• Ruby -- https://github.com/Tarptaeya/path_tracer
• Rust -- https://GitHub.com/peteralieber/rustrays, https://github.com/Nelarius/weekend-raytracer-rust, https://github.com/gkmngrgn/rayt/tree/master/rayt-rust, https://github.com/akinnane/RayTracingInOneWeekend, https://github.com/viktorku/wort, https://github.com/POMMI3R/dasom-rs, https://github.com/navierr/ray-tracing-in-one-weekend-rs, https://github.com/nico-abram/rtweekend-rs, https://github.com/heyajulia/raytracer, https://github.com/anjinl/rust_one_weekend, https://github.com/garethkcjones/rays, https://github.com/misterdanb/raytracinginrust ( book), https://github.com/aganders3/wasm-ray, https://github.com/nya3jp/raytracing, https://github.com/NonL4331/Raytracing-Rust, https://github.com/jk-gan/ray-tracer/tree/book1, https://github.com/NicolasGuillaumeSoulie/AnotherRustRayTracingInOneWeekend.git, https://https://github.com/mcallahan/lightray, https://github.com/Srikrishna31/raytracing, https://github.com/armansito/ray-tracing-in-one-weekend, https://github.com/typedrat/rayromano/tree/in-one-weekend
• Scala -- https://github.com/Marantesss/ray-tracing-scala
• SYCL -- https://www.codeplay.com/portal/blogs/2020/05/19/ray-tracing-in-a-weekend-with-sycl-basic-sphere-tracing.html
• TypeScript -- https://github.com/ahuth/raytrace2, https://github.com/noiron/ray-tracing-in-one-weekend-typescript
• Zig -- https://github.com/Nelarius/weekend-raytracer-zig, https://github.com/Cloudssss/raytracing_in_one_weekend_zig
• Javascript -- https://github.com/gurpreetsingh-exe/raytracer
• Lean 4 -- https://github.com/kmill/lean4-raytracer
• PHP -- https://github.com/phpia/raytracer
• Haskell -- https://github.com/Viva-Lambda/rt-haskell/
• Erlang -- https://github.com/tanguyl/raytracer

• C -- https://github.com/Morozov-5F/raytracing-weekend
• C -- https://github.com/define-private-public/PSRayTracing, https://github.com/TheRayTracer/Monte_Carlo, https://github.com/LiuZengqiang/RayTracingTheNextWeek
• Clojure -- https://github.com/Clojure2D/clojure2d-examples/tree/master/src/rt4/the_next_week
• CUDA -- https://github.com/D-K-E/cuda-raytracer
• Julia -- https://github.com/rafaellg79/raytracing
• Java -- https://github.com/catfoolyou/Java-RTX
• Rust -- https://github.com/garethkcjones/rays, https://github.com/nya3jp/raytracing
• OCaml -- https://github.com/MisakaCenter/RayTracer.ml
• Haskell -- https://github.com/Viva-Lambda/rt-haskell/
• Lua -- https://github.com/jonasgeiler/3d-raytracer-lua

• C -- https://github.com/TheRayTracer/Monte_Carlo, https://github.com/LiuZengqiang/RayTracingTheRestofYourLife
• Rust -- https://github.com/Dalamar42/rayt, https://github.com/nya3jp/raytracing, https://github.com/pbmtp/raytracer
• Haskell -- https://github.com/Viva-Lambda/rt-haskell/