A presenter is an object that encapsulates view logic. Like Rails helpers, presenters help you keep complex logic out of your templates. Keynote provides a consistent interface for defining and instantiating presenters.

A Ruby Language Server implementation

Ruby bindings for libnotify using FFI

Distributes fast compiled functions for the Sqreen agent

Organizes ActiveRecord models into a tree/hierarchy using a materialized path implementation based around PostgreSQL's ltree datatype. ltree's operators ensure that queries are fast and easily understood.

A multi-repository management tool integrated with git. for detail see home page

<tt>minitar-cli</tt> is a pure-Ruby command-line tool that uses {minitar}[https://github.com/halostatue/minitar] to provide a command-line tool, +minitar+, for working with POSIX tar(1) archive files.

Metadata (key-value) support for minitest/spec

Let ActiveRecord serialize and cast your UUIDs to and from binary columns in your database.

The New Relic Plugin Gem is used to send plugin data to New Relic from non-application sources.

OmniAuth strategy for Hubspot (borrowed heavily from @kmrshntr)

List leaderboards, post scores, etc.

Ruby client for Google Picasa API

A simple Rack middleware for checking app health.

The Plezi.io Ruby Framework for real time web applications.

Polyphony-http: Polyphonic HTTP for Ruby

As of OSX 10.9 Safari can receive push notifications when it is closed.

Quality is a tool that runs quality checks on your code using community tools, and makes sure your numbers don't get any worse over time. Just add 'rake quality' as part of your Continuous Integration

Rack middleware for serving static gzipped assets generated by the Rails asset pipeline

Ruby extension for ZeroMQ (ZMQ) using CZMQ - High-level C Binding for ØMQ (http://czmq.zeromq.org)