External links
Brain**** interpreter in crystal (https://crystal-lang.org/)
trying a crystal app on aws lambda
Find files with a simple expression syntax
Crystal tool to index file metadata into sqlite3 databases
Graphviz DSL for Crystal
Improved Crystal Path library
calculate per-unit prices
Put.IO command line client, written in Crystal
Toy language parser
command line tool to work with URLs
Web server to accept HTTP requests to call etherwake against a device on a local network