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