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- JavaScript
- C#
- Python
- Ruby
- COBOL (Beta)
- Haskell
- Rust
- λ Calculus (Beta)
- Go
- R (Beta)
- D (Beta)
- Julia (Beta)
- Shell
- CoffeeScript
- Java
- C++
- C
- Fortran (Beta)
- Groovy
- Scala
- PHP
- OCaml (Beta)
- Clojure
- Elixir
- F#
- PowerShell (Beta)
- Nim (Beta)
- Reason (Beta)
- Racket
- TypeScript
- VB (Beta)
- Forth (Beta)
- Haxe (Beta)
- Kotlin
- CommonLisp (Beta)
- Dart
- Pascal (Beta)
- Lua
- Perl (Beta)
- Elm (Beta)
- Erlang (Beta)
- Prolog (Beta)
- Crystal
- Swift
Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.