ruby-weatherhacks is a wrapper library for livedoor Weather Hacks(http://weather.livedoor.com/weather_hacks/).

Parlay is a command line helper which intercepts some actions such as deleting files, and while it will perform all commands, it may keep copies in 'trash', use version control (without explicitly specifying a version control command), keep copies of old versions, or otherwise intelligently prevent the user from accidentally wrecking their project. It also keeps full, descriptive logs....

Fat Free CRM is open source Ruby on Rails-based customer relationship management platform. Out of the box it features group collaboration through task assignments, campaign and lead management, contact lists, and opportunity tracking.

The project goal is to raise the bar for the open source software and spur CRM innovation by providing clean solid codebase that can be easily extended and customized by developers....

Application for building web photo albums. Features: FTP Browser, Exif viewer, Thumbnail and Image processing, HTML generation, CSS styles, slideshow (Javascript or JavaFX). Just build your gallery and upload. You won't need any server side scripting or database....

Whois is an intelligent pure Ruby WHOIS client and parser.

It provides a flexible and programmable API to query WHOIS servers and a command-line interface to run WHOIS queries from the console.

OpenProject is a web based project management system built on Ruby on Rails,

Fancy is a dynamic, object-oriented programming language heavily inspired by Smalltalk, Ruby and Erlang. It supports dynamic code evaluation (as in Ruby & Smalltalk), class-based mixins, (simple) pattern matching, runtime introspection & reflection, "monkey patching" and much more. It runs on Rubinius, the Ruby VM, and thus has first-class integration with Ruby's core library and any additional Ruby libraries that run on Rubinius, including most C-extensions....

A library for storing encrypted data in Mongo,

Eatmonkey is a download manager that works exclusively with aria2, the ultra fast download utility. It has support for HTTP/FTP, BitTorrent and Metalink files.

Rainpress is a compressor for CSS. It's written in ruby, but should not be limited to ruby projects.

Rainpress does not apply common compression algorithms like gzip, it removes unnecessary characters and replaces some attributes with a shorter equivalent name....