Here are 27 solved katas; each in a different language.

Sources: CodingDojo, Ruby Quiz, and CodeKata.

• Language: Ruby
• Solution: KataBankOCR.rb
• Tests: KataBankOCR_test.rb

• Language: Java
• Solution: KataFizzBuzz.java
• Tests: KataFizzBuzzTest.java; see junit.sh.

• Language: Python
• Solution: KataPotter.py
• Tests: KataPotter_test.py
• Remark: It needs more tests to know if it's really solved

• Language: Bash
• Solution: KataRomanNumerals.sh
• Tests: KataRomanNumerals_test.sh; see also assert.sh.

• Language: JavaScript
• Solution: KataRomanCalculator.js
• Tests: KataRomanCalculator_tests.js

• Language: PHP
• Solution: KataNumberToLCD.php
• Tests: KataNumberToLCD_tests.php

• Language: C
• Solution: KataTennis.c
• Tests: KataTennis_tests.c

• Language: Scala
• Solution: KataBowling.scala
• Tests: KataBowlingTest.scala using ScalaTest 1.7.1; see KataBowling_tests.sh for command-line shortcuts.

• Language: CoffeeScript
• Solution: KataPokerHands.coffee
• Tests: KataPokerHands_tests.coffee using jasmine-node

• Language: Io
• Solution: KataMinesweeper.io
• Tests: KataMinesweeper_tests.io

• Language: Lisp
• Solution: KataKarateChop.lisp
• Tests: KataKarateChop_tests.lisp

• Language: Perl
• Solution: KataReversi.pl
• Tests: KataReversi_tests.pl

• Language: Groovy
• Solution: KataGameOfLife.groovy
• Tests: KataGameOfLife_tests.groovy; see also junit_gameoflife.sh.

• Language: Smalltalk
• Solution: KataSecretSantas.st
• Tests: KataSecretSantas_tests.st; see also gst_tests.sh.

• Language: C++
• Solution: KataWordWrap.cpp
• Tests: KataWordWrap_tests.cpp using CppUnit

• Language: Forth
• Solution: KataDiversion.fth
• Tests: KataDiversion_tests.fth

• Language: Lua
• Solution: KataAnimalQuiz.lua
• Tests: KataAnimalQuiz_tests.lua using lunit

This is a slightly modified version of the RubyQuiz #54 that doesn't use a bits index.

• Language: OCaml
• Solution: kataWordQuery.ml
• Tests: kataWordQueryTests.ml using OUnit; see also kataWordQueryTests.sh.

• Language: Erlang
• Solution: katacheckout.erl
• Tests: katacheckout_tests.erl using EUnit; see also katacheckout_tests.sh.

• Language: Go
• Solution: katadependencies.go
• Tests: katadependencies_test.go

• Language: Clojure
• Solution: src/kata_trigrams/core.clj; use lein run generate f1.txt f2.json to index f1.txt into f2.json, then lein run generate f2.json 42 to generate 42 random words from the file f2.json
• Tests: test/kata_trigrams/test/*.clj; use lein test.

• Language: Rust (0.9)
• Solution: kata_english_words.rs
• Tests: kata_english_words_tests.rs; compile and run with make.

• Language: Crystal (0.4.3)
• Solution: kata_word_chains.cr
• Tests: kata_word_chains_test.cr

• Language: Commodore BASIC
• Solution: kata_sort_chars.bas and a homemade crunched version, kata_sort_chars.crunch.bas
• Tests: kata_sort_chars_tests.sh

• Language: Prolog
• Solution: kata_change.pl and kata_change_cli.pl. Use make then ./kata_change <sum>.
• Tests: kata_change_tests.pl

• Language: awk
• Solution: ./code_cracker.awk -v key=<key>. It reads (and prints) one message per line.
• Tests: ./code_cracker_tests.sh

• Language: Julia
• Solution: ./parse_id3.jl <file1.mp3> [...]
• Tests: ./parse_id3_test.jl