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.

ActsAsTaggableOn is a tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.

This plugin was originally based on Acts as Taggable on Steroids by Jonathan Viney. It has evolved substantially since that point, but all credit goes to him for the initial tagging functionality that so many people have used....

The WSO2 ESB is a lightweight and easy-to-use Open Source Enterprise Service Bus (ESB) available under the Apache Software License v2.0. WSO2 ESB allows administrators to simply and easily configure message routing, virtualization, intermediation, transformation, logging, task scheduling, load balancing, failover routing, event brokering, etc.. The runtime has been designed to be completely asynchronous, non-blocking and streaming based on the Apache Synapse core....

"a command line tool which allows us to easily install, manage and work with multiple ruby environments from interpreters to sets of gems."

god is a tool that monitors various attributes of running processes and can start/restart/stop them under certain situations. Replaces monit.

Radiant is a no-fluff, open source content management system designed for small teams.

Radiant features:

• An elegant user interface
• Flexible templating with layouts, snippets, page parts, and a custom tagging language
• A first-class extension/plugin system...

BlueCloth is a Ruby implementation of Markdown, a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML).

Hackety Hack is the coder’s starter kit: sound, animation, video, messaging in a low-key ruby environment.

Xapian is an Open Source Search Engine Library, released under the GPL. It's written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C#, Ruby, Lua and Erlang (so far!)

Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators....

Asciidoctor is a Ruby gem that provides a pure-Ruby processor for turning AsciiDoc files or strings into HTML5 and other output formats.

Asciidoctor uses simple built-in ERB templates to style the output in a way that roughly matches the default HTML 5 and DocBook 4.5 output of the native AsciiDoc Python processor. You can override this behavior by providing your own Tilt-compatible templates....