Awesome is a toy language which is a mix of Ruby syntax and Python's indentation by Marc-Andre Cournoyer.
From:
http://createyourproglang.com/
bundle install
rbenv rehash
On the project root directory:
About lexer:
ruby test/lexer_test.rb
About parser:
racc -o src/parser.rb src/grammar.y
ruby test/parser_test.rb
About runtime:
ruby test/runtime_test.rb