MessagePack is a binary-based efficient object serialization library. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small.

A plain-Ruby implementation of GraphQL.

memoize methods invocation

This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program

A plain-Ruby implementation of GraphQL.

rqrcode is a library for encoding QR Codes. The simple interface allows you to create QR Code data structures and then render them in the way you choose.

Inspired by ctemplate, Mustache is a framework-agnostic way to render logic-free views. As ctemplates says, "It emphasizes separating logic from presentation: it is impossible to embed application logic in this template language. Think of Mustache as a replacement for your views. Instead of views consisting of ERB or HAML with random helpers and arbitrary logic, your views are broken into two parts: a Ruby class and an HTML template.

Go faster, off the Rails

Opal is a Ruby to JavaScript compiler. It is source-to-source, making it fast as a runtime. Opal includes a compiler (which can be run in any browser), a corelib and runtime implementation. The corelib/runtime is also very small.

rqrcode_core is a Ruby library for encoding QR Codes. The simple interface (with no runtime dependencies) allows you to create QR Code data structures.

A suite of instrumentation metric primitivesthat can be exposed through a web services interface.

Rack middleware to measure production code usage (LOC runtime usage)

Provides a C-optimized method for determining if a string is blank

Powerful tool to avoid N+1 DB or HTTP queries

This library provides an authorization framework with a declarative DSL With this library, you can write permission policies that are separate from business logic. This library is in production use at GitLab.com

Oga is an XML/HTML parser written in Ruby.

ActiveRecord connection adapter for PostGIS. It is based on the stock PostgreSQL adapter, and adds built-in support for the spatial extensions provided by PostGIS. It uses the RGeo library to represent spatial data in Ruby.

Go faster, off the Rails

Efficient, immutable, thread-safe collection classes for Ruby

It makes histograms out of Ruby data. How cool is that!? Pretty cool if you ask me.