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- Java
- Ruby
- Python
- JavaScript
- C#
- CoffeeScript
- C++
- Haskell
- Rust
- COBOL (Beta)
- Factor (Beta)
- Go
- D (Beta)
- C
- Lua
- TypeScript
- λ Calculus (Beta)
- Crystal
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- PHP
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- NASM
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- Prolog (Beta)
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- Groovy
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.