debug
debug!(…) macro for pp-style debugging
artanis
Sinatra-like DSL (abusing macros)
var
Object.var macro for Crystal
version_from_shard
A macro to declare the VERSION constant from the value found in shard.yml
mpp
The mini pre processor parses files and resolves C-style #include and #define macros
zir
Realizes to write macros in any scripts into any languages
cling
A modular, non-macro-based command line interface library
spec_assert
Assert macro that lets you write specs naturally without a special expectation DSL
todo_or_diehard
Provides macros for Crystal that implement compile-time and runtime checked reminders