arvicco

win

Rubyesque interfaces and wrappers for Windows API functions defined using FFI

rippler

Command line client for Ripple payment platform. It uses Ripple websocket API to send commands and receive responses.

dde

Server that mimics Excel receiving XLTable data via DDE protocol

moneydance-ruby

This is a Moneydance extension that adds Ruby scripting support to it.

win_gui

Rubyesque interfaces and wrappers for Win32 API GUI functions

avalon

Helper scripts for Bitcoin and Avalon miner units management

swing

Straightforward wrappers for javax.swing primitives

fin

Domain models that represent Financial/DataFeed entities and basic data structures used to store and access them

ib-java

Test cases for original Java TWS API

mtgox

Ruby wrapper for the Mt. Gox Trade API

p2ruby

Ruby wrappers for RTS Plaza2 (P2ClientGate) lib

BeautifyRuby

Sublime Text 2 Plugin to Beautify Ruby

bitcoinwhitepaper

hacktm

A C++ library for experimenting with Numenta's Cortical Learning Algorithms

styleguide

arvo

The Urbit operating system

bitfinex-api-rb

elus

New project elus

etc

EthereumClassic

ethereumclassic.github.io

Ethereum Classic Website

ffi-rzmq

FFI bindings for ZeroMQ so the library can be used under JRuby and other FFI-compliant ruby runtimes

ib-ruby

Ruby interface to Interactive Brokers' TWS API

p2

P2ClientGate full install (using it as a submodule)

poloniex

A ruby wrapper for the poloniex.com api

poster

Poster is a tool that helps with repetitive tasks (like forum posting) automation

swing_tutorial

Learning JRuby Swing

bitcoin.org

Bitcoin.org website

bitfinex

Ruby library for Bitfinex.com API

Coin.jl

A (self-educational, incomplete, and likely incorrect) library for working with Bitcoin written in Julia

stlr

Stellr is a Ruby commandline client for Stellar (www.stellar.org) network. You could consider it a reincarnation of Rippler (https://github.com/arvicco/rippler).