EventMachine is an event-driven I/O and lightweight concurrency library for Ruby. It provides event-driven I/O using the Reactor pattern, much like JBoss Netty, Apache MINA, Python's Twisted, Node.js, libevent and libev.

EventMachine - Fast, simple event-processing library for Ruby programs

Redmine is a flexible project management web application. Written using Ruby on Rails framework, it is cross-platform and cross-database. Its feature include:
  	<ul>
		<li>Multiple projects support</li>
		<li>Flexible role based access control</li>
		<li>Flexible issue tracking system</li>
		<li>Gantt chart and calendar</li>
		<li>News, documents &#38; files management</li>
		<li>Feeds &#38; email notifications</li>
		<li>Per project wiki</li>
		<li>Per project forums</li>
		<li>Time tracking</li>
		<li>Custom fields for issues, time-entries, projects and users</li>
		<li>SCM integration (SVN, CVS, Git, Mercurial, Bazaar and Darcs)</li>
		<li>Issue creation via email</li>
		<li>Multiple LDAP authentication support</li>
		<li>User self-registration support</li>
		<li>Multilanguage support</li>
		<li>Multiple databases support</li>
	</ul>

Redmine is a flexible project management web application. Written using Ruby on Rails framework, it is cross-platform and cross-database.

Redmine - Project Management system in Ruby

Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Load balancing is done entirely by the operating system kernel. Requests never pile up behind a busy worker process. Does not care if your application is thread-safe or not, workers all run within their own isolated address space and only serve one client at a time for maximum robustness.



Unicorn - Rack HTTP server for fast clients and Unix

Prawn is a pure Ruby PDF generation library that provides a lot of great functionality while trying to remain simple and reasonably performant. It provides support to do Vector drawing, including lines, polygons, curves, ellipses, etc. Extensive text rendering, Security features including encryption and password protection, PNG and JPG image embedding, with flexible scaling options and lot more.

Prawn - Fast, Nimble PDF Generation For Ruby

TaskJuggler is project management software for serious project managers. It covers the complete spectrum of project management tasks from the first idea to the completion of the project. It assists you during project scoping, resource assignment, cost and revenue planing, risk and communication management. It is beyond Gantt Chart drawing.

TaskJuggler - Project Management Software in Ruby

ChiliProject is a web based project management system. It supports your team throughout the complete project life cycle, from setting up and discussing a project plan, over tracking issues and reporting work progress to collaboratively sharing knowledge.

  It helps to do project planning by setting up the roadmap and prepare project plan using Gantt chart. It could track the issues basically action items and reports it progress. Each issue / action item could be tracked, discussed and monitored. Worfklow could be created using trackers, so that issues / action item can follow a specific work flow. 
  
  Collaboration is a must for project management tool. ChilliProject provides Wiki to collaborate, share information, documents with other team members. It helps to integrate the code repository like Subversion, Git and browse the code. Additional to that it has Forum support, feed support to publish project news.  

  ChilliProject is a fork of <A HREF="http://www.redmine.org/" target="_blank">Redmine</A>. A group of developers from the Redmine community not interested with the way its been maintained and thought to fork it to continue the stable development of the project. Authors have explained the <A HREF="https://www.chiliproject.org/projects/chiliproject/wiki/Why_Fork" target="_blank">reason to fork</A>.

ChiliProject is a web based project management system. It supports your team throughout the complete project life cycle, from setting up and discussing a project plan, over tracking issues and reporting work progress to collaboratively sharing knowledge.

ChiliProject - A redmine fork

tlog is a git-based tool to help you with time and ticket tracking on your projects. It can create time logs for project tasks and Track time working on a task.

tlog - Git tool for tracking time and tasks

Redmine Backlogs is a Redmine plugin for agile teams. Drag and drop interface to manage the product and sprint backlogs. Visual management of stories and their tasks. Burn down charts to keep tabs on the project's progress.

Redmine Backlogs - plugin for agile

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