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- Python
- JavaScript
- Ruby
- Elixir
- C
- C#
- C++
- CoffeeScript
- Haskell
- PHP
- Julia (Beta)
- Rust
- Java
- Racket
- R (Beta)
- COBOL (Beta)
- Crystal
- D (Beta)
- Scala
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- NASM
- Prolog (Beta)
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- Groovy
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- Go
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- SQL
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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.