email
Simple e-mail sending library
carbon
Fun, testable, and adapter-based email library
ipaddress
Library to handle IPv4 and IPv6 addresses
spec2
Enhanced spec testing library
cli
Library for building command-line interface applications
faker
A library for generating fake data
readline
bindings to GNU Readline Library
webmock
Library for stubbing HTTP::Client requests
crz
Functional programming library
orion
A minimal, rails-esque routing library
bottle
Numerical computing library supporting N-Dimensional data
num
Numerical computing library supporting N-Dimensional data
minitest
Library for unit tests and assertions
optarg
Yet another library for parsing command-line options and arguments
hedron
An extendable GUI library, with markup language capabilities
mocks
Mocking library for Crystal
teeplate
A library for rendering multiple template files
hashids
A library to generate YouTube-like ids from one or many numbers
ohm
Object-hash mapping library for Redis
glove
A library for gaming development
fancyline
Readline-esque library with fancy features
authentic
An authentication library for Lucky projects
termbox
Bindings and extension library for
termbox (terminal UI library)
callback
A library for defining and invoking callbacks
pluto
A fast and convenient image processing library
noir
Syntax Highlight Library
learn
Sklearn-like machine-learning library
crystalla
Library for Numerical Methods. It binds to LAPACK and is unashamedly inspired by Numpy
pegmatite
A high-performance Parsing Expression Grammar (PEG) library
linalg
Linear algebra library inspired by MATLAB and SciPy.linalg
bisect
Library for maintaining sorted arrays
motion
Object oriented frontend library for building reactive, real-time UI components with amber
CrSerializer
Extensible annotation based serialization/deserialization/validation library
Archived
water
A library for writing HTML in plain Crystal
praetorian
Minimalist authorization library inspired by Pundit
sanitize
library for transforming HTML/XML trees to sanitize HTML from untrusted sources
common_mark
Crystal wrapper for libcmark, the reference CommonMark C library
lime
A library for drawing graphics on the console screen
parsec
Parsing DSL inspired by Haskell library Parsec
routing
Extensible library to deal with http request and string based routing
evented
Publish and Subscribe library
rosetta
A blazing fast internationalization (i18n) library with compile-time key lookup supporting YAML and JSON formats
qrencode
Library for QR code generation based on libqrencode
crake
CRystal mAKE library
tail
Tailing library to get and/or follow the end of a file/IO
accord
Shareable validation library for Crystal Objects
denetmen
Micro check library that patches Crystal stdlib
beryl
Action-focused HTTP routing library
fastimage
Library that finds the dimensions and type of an image fetching as little as needed
microtest
Small opinionated testing library focusing on power asserts
kube-client
Crystal client library for the Kubernetes (1.11+) API
gsl
GNU Scientific Library bindings
cudnn
Tensor library powered by CUDA and CuDNN
packetz
Packet capturing library built with LibPcap
brotli
Bindings to the Google brotli compression library
moola
Library for dealing with money and conversion (inspired by
RubyMoney)
predict
Satellite prediction library using the sgp4 model
miniss
CLI app & library that displays a list of open sockets; it is a minimal alternative to ss or netstat
cryogonal
Composable Discord API library and toolkit