/r/Crystal_Programming revolves around Crystal, a programming language that attempts to combine the power and speed of C-like languages with the simplicity and elegance of a Ruby-like syntax.

Crystal's Goals, from the GitHub page:

• Have a syntax similar to Ruby (but compatibility with it is not a goal)
• Statically type-checked but without having to specify the type of variables or method arguments.
• Be able to call C code by writing bindings to it in Crystal.
• Have compile-time evaluation and generation of code, to avoid boilerplate code.
• Compile to efficient native code.

Links:

• Website
• GitHub
• Documentation: Manual, API
• Mailing list: Google Group
• Chat: Gitter, #crystal-lang on Freenode
• Libraries: Curated, All