beego is an open-source, high-performance web framework for the Go programming language.

A realtime distributed messaging platform

A simple, fast, and fun package for building command line apps in Go

Vitess is a database clustering system for horizontal scaling of MySQL.

An open-source graph database

groupcache is a caching and cache-filling library, intended as a replacement for memcached in many cases.

Classy web framework for Go

Open Policy Agent (OPA) is an open source, general-purpose policy engine.

Go testing in the browser. Integrates with `go test`. Write behavioral tests in Go.

Distributed, offline-first bug tracker embedded in git, with bridges

Perkeep (née Camlistore) is your personal storage system for life: a way of storing, syncing, sharing, modelling and backing up content.

Service orchestration and management tool.

A Mighty CLI for AWS

A quick and easy way to setup a RESTful JSON API

Reference server implementation in Go of tus: the open protocol for resumable file uploads

Go binding to ImageMagick's MagickWand C API

Go Router + Middleware. Your Contexts.

A Go framework for building JSON web services inspired by Dropwizard

Consistent hash package for Go.

interesting go libs

Digital Signal Processing for Go

MySQL Client API written entirely in Go

An optimized substring search engine written in Go

Go server for processing and serving of images

linear algebra for go

go (golang) wrapper around imagemagick

A golang riak client inspired by the Ruby riak-client from Basho and riakpbc from mrb

Abandoned, please see https://github.com/plutov/sphinx

Map, Reduce, Filter, De/Multiplex, etc. for the Go language.