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[665 users on Ohloh]
Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, extensible, and portable.
Ruby on Rails
[513 users on Ohloh]
Ruby on Rails is a full-stack MVC framework for database-backed web applications that's optimized for programmer happiness and sustainable productivity. It lets you write beautiful code by favoring convention over configuration.

From the Ajax in the view, to the request and response in the controller, to the domain model wrapping the database, Rails gives you a pure-Ruby development environment. To go live, all you need to add is a database and a web server.

NetBeans IDE
[355 users on Ohloh]
The NetBeans IDE is a free, open-source Integrated Development Environment for software developers. The IDE runs on many platforms including Windows, Linux, Solaris, and the MacOS. It is easy to install and use straight out of the box. The NetBeans IDE provides developers with all the tools they need to create professional cross-platform desktop, enterprise, web and mobile applications.
[339 users on Ohloh]
RubyGems is a package manager for the Ruby. It provides a standard format for distributing Ruby programs and libraries (in a self-contained format called "gems"), a tool designed to easily manage the installation of gems, and a server for distributing them.
[299 users on Ohloh]
Rake is a Ruby make-like utility using standard Ruby syntax for the build specification file.
[212 users on Ohloh]
A small fast HTTP server written in (mostly) Ruby that can be used to host web frameworks directly with HTTP rather than FastCGI or SCGI.
[172 users on Ohloh]
RSpec is a BDD tool and a framework which provides programmers with a Domain Specific Language to describe the behaviour of Ruby code with readable, executable examples that guide you in the design process and serve well as both documentation and tests.
[150 users on Ohloh]
Tags: ruby rails deployment
A utility for executing commands in parallel on multiple machines, such as deploying applications to a cluster of boxes.
[105 users on Ohloh]
Cross platform BDD tool that lets domain experts define software behaviour in plain text. The text can be executed as automated tests.
[78 users on Ohloh]
KOffice is a free, integrated office suite for KDE, the K Desktop Environment. KOffice applications uses OpenDocument as their native file format when possible. The suite is released separately from KDE.

The KOffice suite includes the following applications:
- KWord - A frame-based word processor
- KSpread - A powerful spreadsheet application
- KPresenter - A full-featured presentation program
- Kexi - An environment for creating data...

[75 users on Ohloh]
A flexible project management web application written using Ruby on Rails framework. Key features include:
* Multiple projects support
* Flexible role based access control.
* Flexible issue tracking system
* Gantt chart and calendar
* News, documents & files management
* Feeds & email notifications.
* Per project wiki
* Per project forums
* Simple time tracking f...
[71 users on Ohloh]
An interface to the ImageMagick and GraphicsMagick image processing libraries. Supports over 100 image formats, including GIF, JPEG, PNG. See rmagick.rubyforge.org for prereqs, install FAQ, more.
Macromates TextMate Bundles
[63 users on Ohloh]
"Official" TextMate Bundles
[61 users on Ohloh]
Haml is a markup language that’s used to cleanly and simply describe the XHTML of any web document without the use of inline code. Haml functions as a replacement for inline page templating systems such as PHP, ASP, and ERB, the templating language used in most Ruby on Rails applications. However, Haml avoids the need for explicitly coding XHTML into the template, because it itself is a description of the XHTML, with some code to generate dynamic content.
[53 users on Ohloh]
Tags: scrap html ruby parser gem scraper
Hpricot is a very flexible HTML parser, based on Tanaka Akira's HTree and John Resig's JQuery, but with the scanner recoded in C (using Ragel for scanning.) I've borrowed what I believe to be the best ideas from these wares to make Hpricot heaps of fun to use.
[53 users on Ohloh]
JRuby is an 100% pure-Java implementation of the Ruby programming language.

JRuby is the effort to recreate the Ruby interpreter in Java. JRuby is tightly integrated with Java to allow both to script any Java class and to embed the interpreter into any Java application.

[49 users on Ohloh]
Lightweight, fast and modular MVC Ruby web framework. Excellent for high performance dynamic pages and web services.
[47 users on Ohloh]
Puppet lets you centrally manage every important aspect of your system using a cross-platform specification language that manages all the separate elements normally aggregated in different files, like users, cron jobs, and hosts, along with obviously discrete elements like packages, services, and files.

Puppet's simple declarative specification language provides powerful classing abilities for drawing out the similarities between hosts while allowing them to be as specific as necessary, an...

[45 users on Ohloh]
A Ruby interface for the SQLite database engine.
Passenger (mod_rails for Apache)
[43 users on Ohloh]
Phusion Passenger — a.k.a. mod_rails — makes deployment of applications built on the revolutionary Ruby on Rails web framework a breeze. It follows the usual Ruby on Rails conventions, such as “Don’t-Repeat-Yourself”.

Note that the Ohloh source analysis is incorrect. The statistics for C++ and comment count are wrong because the Boost library is included. It is also not true that there's a single developer, because Passenger is commercially supported by Phusion.