NOTICE.md

Crystal Programming Language

Copyright 2012-2023 Manas Technology Solutions.

This product includes software developed at Manas Technology Solutions (https://manas.tech/).

Apache License v2.0 applies to all works.

Please see LICENSE for additional copyright and licensing information.

External libraries information

Crystal compiler links the following libraries, which have their own license:

• LLVM - BSD-3, effectively
• PCRE or PCRE2 - BSD-3
• libevent2 - BSD-3
• libiconv - LGPLv3
• bdwgc - MIT

Crystal compiler calls the following tools as external process on compiling, which have their own license:

• pkg-config - GPLv3

Crystal standard library uses the following libraries, which have their own licenses:

• LLVM - BSD-3, effectively
• PCRE or PCRE2 - BSD-3
• libevent2 - BSD-3
• libiconv - LGPLv3
• bdwgc - MIT
• Zlib - Zlib
• OpenSSL - Apache-2.0
• Libxml2 - MIT
• LibYAML - MIT
• readline - GPLv3
• GMP - LGPLv3

Crystal playground includes the following libraries, which have their own licenses. (There are these files under /src/compiler/crystal/tools/playground/public/vendor):

• jQuery - MIT Copyright JS Foundation and other contributors, https://js.foundation/
• Octicons - MIT (for codes) or OFL-1.1 (for fonts) (c) 2012-2016 GitHub, Inc.
• Materialize - MIT Copyright (c) 2014-2015 Materialize
• CodeMirror - MIT Copyright (C) 2016 by Marijn Haverbeke <marijnh@gmail.com> and others
• ansi_up - MIT Copyright (c) 2011 Dru Nelson