This FIX protocol wrapper enables one to easily parse and create messages complying with the FIX 4.4 specification. It includes definitions for admin messages (logon, heartbeat, resend request, test request), for some market data messages (market data request, market data snapshot, and market data incremental refresh) as well as the ability to easily define other ones.

Flannel is a markup language that is not intended for your web app. It's for your local use, to write a blog entry in your text editor or a number of other uses.

Valve Source Engine log parser

Food products that contain fish sometimes indicate details like fishing area, method or aquaculture country. This parser knows about various ways this is found on a product package, and returns a structured representation of the fish ingredient details.

A data validation library providing a rule-based schema definition language. For checking (incoming) data against a specified schema definition. GDS stands for General Data Structure.

gdstruct - GDS (General Data Structure), a universal, composable data structure, used to store any kind of data. Typical usage is the definition of configurations, specifications and data sets. The GDS language is a special DSL (domain specific language) for defining general data structures. It uses a succinct, indentation-sensitive syntax which makes data representation clear and readable.

Reddy parses RDF/XML, RDFa and N3-rdf into a Graph object. It also serializes RDF/XML and N-Triples from the Graph. * Fully compliant RDF/XML parser. * Fully compliant XHTML/RDFa 1.0 parser. * N3-rdf parser * N-Triples and RDF/XML serializer * Graph serializes into RDF/XML and N-Triples. * ConjunctiveGraph, named Graphs and contextual storage modules. Install with 'gem install gkellogg-reddy'

Ruby implementation of the Gobstones programming language

An executable specification framework.

Guard::Treetop automatically compiles your treetop grammars

Parser for a Tcl-like syntax. Ideal for IRC bots.

A parser and emulator for a minimalist hardware description language.

Ruby library for HL7 2.x

A LaTeX to HTML parser.

JSON parser that understands cross-references and casts to typed Ruby objects.

Huml is to Haml what Scss is to Sass

ICP Agent.

A PEG/Treetop Compatible Grammar for IDS/IPS Rules

Origen interface/driver for the IEEE 1687 (IJTAG) standard

Setup your rails project with everything you need quickly. Not really a Gem, but everything you need is in the gem's files'.