See the Ruby code running in your app.

Embedded markdown template for Ruby on Rails

jr is jq like JSON processor. Its script can be written in Ruby

Minimal Lisp interpreter using 75LOC and only standard libraries excluding the REPL. Inspired by Lis.py.

Render any text as markdown, with code highlighting and all!

Marty is a framework for viewing and reporting on versioned data.

The Semiconductor Developer's Kit

Reflexive

Flyweight diary workflow. ruby-1.9.2 or later is required.

Stacker helps you assemple and manage CloudFormation stacks and dependencies.

Presents Markdown slides in your terminal

Verify that your YARD @param and @return types are correct

The mdtranslator was written by the Alaska Data Integration Working Group (ADIwg) to assist with creating ISO 19139 metadata records. Input to the mdtranslator is JSON conforming to the mdJson-schema. The mdtranslator architecture allows developers to write additional readers for other input formats and/or write additional writers for other output other than ISO 19139.

https://github.com/toptierlabs/api_explorer

actually a set of small API-related tools. very much unlike a hammer at all, which is one large tool.

Arachni is a feature-full, modular, high-performance Ruby framework aimed towards helping penetration testers and administrators evaluate the security of web applications. It is smart, it trains itself by monitoring and learning from the web application's behavior during the scan process and is able to perform meta-analysis using a number of factors in order to correctly assess the trustworthiness of results and intelligently identify (or avoid) false-positives. Unlike other scanners, it takes into account the dynamic nature of web applications, can detect changes caused while travelling through the paths of a web application’s cyclomatic complexity and is able to adjust itself accordingly. This way, attack/input vectors that would otherwise be undetectable by non-humans can be handled seamlessly. Moreover, due to its integrated browser environment, it can also audit and inspect client-side code, as well as support highly complicated web applications which make heavy use of technologies such as JavaScript, HTML5, DOM manipulation and AJAX. Finally, it is versatile enough to cover a great deal of use cases, ranging from a simple command line scanner utility, to a global high performance grid of scanners, to a Ruby library allowing for scripted audits, to a multi-user multi-scan web collaboration platform.

Arcadia IDE

A REPL designed to help novice Ruby programmers build muscle memory for working with variables, manipulating data structures, and defining and invoking methods.

Simple EPUB/PDF generator from Markdown. Inspired by denden converter

Displays a method's code (from source or docs). Supports native C source when core_docs gem is available