It deals with all sorts of calculations around music theory and allows for graphical representations of it

Generate SVG beautiful patterns

Extract the dominant colors from an image.

OpenConferenceWare is an open source web application for events and conferences. This customizable, general-purpose platform provides proposals, sessions, schedules, tracks and more.

Glimmer DSL for LibUI (Fukuoka Award Winning Prerequisite-Free Ruby Desktop Development Cross-Platform Native GUI Library) - Winner of Fukuoka Ruby Award Competition 2022 Special Award (http://www.digitalfukuoka.jp/topics/187?locale=ja) - No need to pre-install any prerequisites. Just install the gem and have cross-platform native GUI that just works on Mac, Windows, and Linux! Glimmer DSL for LibUI aims to provide declarative DSL syntax that visually maps to GUI control hierarchy, convention over configuration via smart defaults, automation of low-level details, requiring the least amount of syntax possible to build GUI, bidirectional data-binding, custom control/window support, and application/gem/window/control scaffolding. If you liked Shoes, You'll love Glimmer!

Worldize allows to draw world countries coloured on base of some numeric value for each country.

A pure Ruby PDF document creation library.

Finds the dominant colors in an image and scores them against a user-defined palette, using the CIE2000 Delta E formula.

Everything you could want for making Phillips Hue lightbulbs obey your every command.

This library provides the ability to create PDF documents using only native Ruby libraries. There are several demo programs available in the demo/ directory. The canonical documentation for PDF::Writer is "manual.pdf", which can be generated using bin/techbook (just "techbook" for RubyGem users) and the manual file "manual.pwd".

TCP application host and proxy server

Smurfville is the home of SMURF, a new and modular approach to Rails frontend development based on the SMACSS approach for CSS. This gem provides a set of tools that help following this approach.

Converts source code into a (bookmarked, themed, and syntax highlighted!) PDF.

rails-data-explorer is a Rails Engine plugin that makes it easy to explore the data in your app using charts and statistics.

Convert TextMate/SublimeText .tmTheme to Emacs 24 deftheme .el

BlinkStick provides a ruby interface to an Agile Innovative BlinkStick via libusb.

The eGTLabs Mu toolkit for unified cloud deployments. This gem contains the Mu deployment interface to cloud provider APIs. It will generate a sample configuration the first time it is invoked. Mu will attempt to autodetect when it's being run in a virtual machine on a known cloud provider and activate the appropriate API with machine-based credentials. Installing this gem on an Amazon Web Service instance, for example, should automatically enable the MU::Cloud::AWS layer and attempt to use the machine's IAM Profile to communicate with the AWS API.

Sorts colors perceptually

Library for dealing with color gradients in ruby

Command line app and library code for Iroki, a phylogenetic tree customization program.