Please take a quick gander at the [contribution guidelines](https://github.com/avelino/awesome-go/blob/master/CONTRIBUTING.md) first. Thanks to all [contributors](https://github.com/avelino/awesome-go/graphs/contributors); you rock!
* [go-cache](https://github.com/pmylund/go-cache) - An in-memory key:value store/cache (similar to Memcached) library for Go, suitable for single-machine applications.
* [goleveldb](https://github.com/syndtr/goleveldb) - An implementation of the [LevelDB](https://code.google.com/p/leveldb/) key/value database in the Go.
* [groupcache](https://github.com/golang/groupcache) - Groupcache is a caching and cache-filling library, intended as a replacement for memcached in many cases.
* [mgo](http://godoc.org/labix.org/v2/mgo) - MongoDB driver for the Go language that implements a rich and well tested selection of features under a very simple API following standard Go idioms.
* [gomail](https://github.com/alexcesaro/mail) - Gomail provides a very simple API to send emails. It supports attachments, multipart emails and encoding of non-ASCII characters.
*Tools for brining generics-like functionality to Go via code generation*
* [gen](https://github.com/clipperhouse/gen) - Code generation tool for ‘generics’-like functionality.
* [go generate](https://docs.google.com/document/d/1V03LUfjSADDooDMhe-_K59EgpTEm3V8uvQRuNMAEnjg/edit) - A proposed code generation syntax from Rob Pike.
* [go-linq](https://github.com/ahmetalpbalkan/go-linq) - .NET LINQ-like query methods for Go.
## GUI
*Libraries for building GUI Applications*
* [go-gtk](http://mattn.github.io/go-gtk/) - Go bindings for GTK
* [gotk3](https://github.com/conformal/gotk3) - Go bindings for GTK3.
* [go-qml](https://github.com/go-qml/qml) - QML support for the Go language
* [ui](https://github.com/andlabs/ui) - Platform-native GUI library for Go.
*Libraries for generating and working with log files.*
* [glog](https://github.com/golang/glog) - Leveled execution logs for Go.
* [go-log](https://github.com/siddontang/go-log) - Log lib supports level and multi handlers.
* [logrus](https://github.com/sirupsen/logrus) - Structured, pluggable logging for Go.
* [seelog](https://github.com/cihub/seelog) - logging functionality with flexible dispatching, filtering, and formatting.
* [stdlog](https://github.com/alexcesaro/log) - Stdlog is an object-oriented library providing leveled logging. It is very useful for cron jobs.
## Machine Learning
*Libraries for Machine Learning.*
* [bayesian](https://github.com/jbrukh/bayesian) - Naive Bayesian Classification for Golang.
* [CloudForest](https://github.com/ryanbressler/CloudForest) - Fast, flexible, multi-threaded ensembles of decision trees for machine learning in pure Go.
* [go-fann](https://github.com/white-pony/go-fann) - Go bindings for Fast Artificial Neural Networks(FANN) library.
* [go-galib](https://github.com/thoj/go-galib) - Genetic Algorithms library written in Go / golang
* [golinear](https://github.com/danieldk/golinear) - liblinear bindings for Go
* [go-pr](https://github.com/daviddengcn/go-pr) - Pattern recognition package in Go lang.
* [libsvm](https://github.com/datastream/libsvm) - libsvm golang version derived work based on LIBSVM 3.14.
* [mlgo](https://code.google.com/p/mlgo/) - This project aims to provide minimalistic machine learning algorithms in Go.
* [neural-go](https://github.com/schuyler/neural-go) - A multilayer perceptron network implemented in Go, with training via backpropagation.
* [probab](https://code.google.com/p/probab/) - Probability distribution functions. Bayesian inference. Written in pure Go.
* [shield](https://github.com/eaigner/shield) - Bayesian text classifier with flexible tokenizers and storage backends for Go
## Messaging
*Libraries that implement messaging systems*
* [dbus](https://github.com/godbus/dbus) - Native Go bindings for D-Bus.
* [gopush-cluster](https://github.com/Terry-Mao/gopush-cluster) - gopush-cluster is a go push server cluster.
* [Uniqush-Push](https://github.com/uniqush/uniqush-push) - A redis backed unified push service for server-side notifications to mobile devices.
* [go-nlp](https://github.com/nuance/go-nlp) - Utilities for working with discrete probability distributions and other tools useful for doing NLP work.
* [icu](https://github.com/goodsign/icu) - Cgo binding for icu4c C library detection and conversion functions. Guaranteed compatibility with version 50.1.
* [libtextcat](https://github.com/goodsign/libtextcat) - Cgo binding for libtextcat C library. Guaranteed compatibility with version 2.2.
* [MMSEGO](https://github.com/awsong/MMSEGO) - This is a GO implementation of [MMSEG](http://technology.chtsai.org/mmseg/) which a Chinese word splitting algorithm.
* [paicehusk](https://github.com/Rookii/paicehusk) - Golang implementation of the Paice/Husk Stemming Algorithm
* [porter](https://github.com/a2800276/porter) - This is a fairly straighforward port of Martin Porter's C implementation of the Porter stemming algorithm.
* [snowball](https://github.com/goodsign/snowball) - Snowball stemmer port (cgo wrapper) for Go. Provides word stem extraction functionality [Snowball native](http://snowball.tartarus.org/).
* [stemmer](https://github.com/dchest/stemmer) - Stemmer packages for Go programming language. Includes English and German stemmers.
* [textcat](https://github.com/pebbe/textcat) - A Go package for n-gram based text categorization, with support for utf-8 and raw text
* [gl](https://github.com/go-gl/gl) - Go bindings for OpenGL. Requires an external dependency GLEW.
* [glfw3](https://github.com/go-gl/glfw3) - Go bindings for GLFW 3.
* [glow](https://github.com/errcw/glow) - Go binding generator and bindings for OpenGL.
* [mathgl](https://github.com/go-gl/mathgl) - Pure Go math package specialized for 3D math, with inspiration from GLM.
## ORM
*Libraries that implement Object-Relational Mapping or datamapping techniques.*
* [BeeDB](https://github.com/astaxie/beedb) - go ORM,support database/sql interface，pq/mysql/sqlite.
* [GORM](https://github.com/jinzhu/gorm) - The fantastic ORM library for Golang, aims to be developer friendly.
* [gorp](https://github.com/coopernurse/gorp) - Go Relational Persistence, ORM-ish library for Go.
* [hood](https://github.com/eaigner/hood) - Database agnostic ORM for Go.
* [QBS](https://github.com/coocood/qbs) - Stands for Query By Struct. A Go ORM.
* [upper.io/db](https://github.com/upper/db) - Single interface for interacting with different data sources through the use of adapters that wrap mature database drivers.
* [Xorm](https://github.com/go-xorm/xorm) - Simple and powerful ORM for Go.
## Package Management
*Libraries for package and dependency management.*
* [godep](https://github.com/tools/godep) - dependency tool for go, godep helps build packages reproducibly by fixing their dependencies.
* [gom](https://github.com/mattn/gom) - Go Manager - bundle for go.
* [goop](https://github.com/nitrous-io/goop) - A simple dependency manager for Go (golang), inspired by Bundler.
* [gpm](https://github.com/pote/gpm) - Barebones dependency manager for Go.
* [go.matrix](https://github.com/skelterjohn/go.matrix) - linear algebra for go
* [gostat](https://code.google.com/p/gostat/) - A statistics library for the go language
* [mudlark-go](https://code.google.com/p/mudlark-go-pkgs/) - A collection of packages providing (hopefully) useful code for use in software using Google's Go programming language.
* [vectormath](https://github.com/spate/vectormath) - Vectormath for Go, an adaptation of the scalar C functions from Sony's Vector Math library, as found in the Bullet-2.79 source code.
* [amber](https://github.com/eknkc/amber) - Amber is an elegant templating engine for Go Programming Language It is inspired from HAML and Jade.
* [gold](https://github.com/yosssi/gold) - Gold is a template engine for Go. This simplifies HTML coding in Go web application development. This is influenced by Slim and Jade.
* [kasia.go](https://github.com/ziutek/kasia.go) - Templating system for HTML and other text documents - go implementation.
* [mustache](https://github.com/hoisie/mustache) - A Go implementation of the Mustache template language.
* [pongo2](https://github.com/flosch/pongo2) - A Django-like template-engine for Go.
* [Razor](https://github.com/sipin/gorazor) - Razor view engine for Golang.
* [Soy](https://github.com/robfig/soy) - Closure templates (aka Soy templates) for Go, following the [official spec](https://developers.google.com/closure/templates/)
* [GoSpec](https://github.com/orfjackal/gospec) - BDD-style testing framework for the Go programming language.
* [gospecify](https://github.com/stesla/gospecify) - This provides a BDD syntax for testing your Go code. It should be familiar to anybody who has used libraries such as rspec.
* [Hamcrest](https://github.com/rdrdr/hamcrest) - fluent framework for declarative Matcher objects that, when applied to input values, produce self-describing results.
* [restit](https://github.com/yookoala/restit) - A Go micro framework to help writing RESTful API integration test.
* [Testify](https://github.com/stretchr/testify) - A sacred extension to the standard go testing package.
* Mock
* [gomock](https://code.google.com/p/gomock/) - Mocking framework for the Go programming language.
* [mockhttp.go](https://github.com/tv42/mockhttp.go) - Mock object for Go http.ResponseWriter
* [blackfriday](https://github.com/russross/blackfriday) - Markdown processor in Go
* [github_flavored_markdown](http://godoc.org/github.com/shurcooL/go/github_flavored_markdown) - GitHub Flavored Markdown renderer in Go.
* [bluemonday](https://github.com/microcosm-cc/bluemonday) - HTML Sanitizer
* [go-humanize](https://github.com/dustin/go-humanize) - Formatters for time, numbers, and memory size to human readable format.
* [go-pkg-rss](https://github.com/jteeuwen/go-pkg-rss) - This package reads RSS and Atom feeds and provides a caching mechanism that adheres to the feed specs.
* [go-pkg-xmlx](https://github.com/jteeuwen/go-pkg-xmlx) - Extension to the standard Go XML package. Maintains a node tree that allows forward/backwards browsing and exposes some simple single/multi-node search functions.
* [slug](https://github.com/gosimple/slug) - URL-friendly slugify with multiple languages support.
* [toml](https://github.com/BurntSushi/toml) - TOML configuration format (encoder/decoder with reflection).
* [yaml](https://bitbucket.org/zombiezen/yaml) - Implements a YAML 1.2 parser in Go.
* [aac/h264](https://github.com/go-av/codec) - Golang aac/h264 encoder and decoder.
* [gmf](https://github.com/3d0c/gmf) - Go bindings for FFmpeg av\* libraries.
* [gst](https://github.com/ziutek/gst) - Go bindings for GStreamer.
## Web Frameworks
*Full stack web frameworks.*
* [Beego](https://github.com/astaxie/beego) - beego is an open-source, high-performance web framework for the Go programming language.
* [Gin](https://github.com/gin-gonic/gin) - Gin is a web framework written in Go! It features a martini-like API with much better performance, up to 40 times faster. If you need performance and good productivity.
* [gocraft/web](https://github.com/gocraft/web) - A mux and middleware package in Go.
* [Goji](https://github.com/zenazn/goji) - Goji is a minimalistic web framework for Golang that's high in antioxidants.
* [Gorilla](https://github.com/gorilla/) - Gorilla is a web toolkit for the Go programming language.
* [httprouter](https://github.com/julienschmidt/httprouter) - A high performance router. Use this and the standard http handlers to form a very high performance web framework.
* [mango](https://github.com/paulbellamy/mango) - Mango is a modular web-application framework for Go, inspired by Rack, and PEP333.
* [Martini](https://github.com/go-martini/martini) - Martini is a powerful package for quickly writing modular web applications/services in Golang.
* [pat](https://github.com/bmizerany/pat) - Sinatra style pattern muxer for Go’s net/http library, by the author of Sinatra.
* [Revel](https://github.com/revel/revel) - A high-productivity web framework for the Go language.
* [tigertonic](https://github.com/rcrowley/go-tigertonic) - A Go framework for building JSON web services inspired by Dropwizard
* [traffic](https://github.com/pilu/traffic) - Sinatra inspired regexp/pattern mux and web framework for Go.
* [web.go](https://github.com/hoisie/web) - A simple framework to write webapps in Go.
### Middlewares
* [alice](https://github.com/justinas/alice) - Painless middleware chaining for Go.
* [muxchain](https://github.com/stephens2424/muxchain) - Lightweight middleware for net/http.
* [negroni](https://github.com/codegangsta/negroni) - Idiomatic HTTP Middleware for Golang.
* [render](https://github.com/unrolled/render) - Go package for easily rendering JSON, XML, and HTML template responses.
* [GoSublime](https://github.com/DisposaBoy/GoSublime) - A Golang plugin collection for the text editor SublimeText 2 providing code completion and other IDE-like features.
* [Circuit](https://github.com/gocircuit/circuit) - Circuit is a programmable platform-as-a-service (PaaS) and/or Infrastructure-as-a-Service (IaaS), for management, discovery, synchronization and orchestration of services and hosts comprising cloud applications.
* [confd](https://github.com/kelseyhightower/confd) - Manage local application configuration files using templates and data from etcd or consul.
