This package provides bindings for any kind of Ruby exceptions.

This package provides a RBTree is a sorted associative collection that is implemented with a Red-Black Tree. It maps keys to values like a Hash, but maintains its elements in ascending key order. The interface is the almost identical to that of Hash.

Slop provides a Ruby domain specific language for gathering options and parsing command line flags.

nio provides cross-platform asynchronous I/O primitives in Ruby for scalable network clients and servers.

Timecop provides "time travel" and "time freezing" capabilities, making it easier to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.

Faraday_Middleware is a collection of middleware for the Faraday-based API wrappers.

Asciidoctor generates single-page documents. This extension splits documents up into multiple HTML pages according to their headings, with configurable levels.

Psych is a YAML parser and emitter. Psych leverages libyaml for its YAML parsing and emitting capabilities. In addition to wrapping libyaml, Psych also knows how to serialize and de-serialize most Ruby objects to and from the YAML format.

Optimized XML (Ox) is a fast XML parser and object serializer for Ruby written as a native C extension. It was designed to be an alternative to Nokogiri and other Ruby XML parsers for generic XML parsing and as an alternative to Marshal for Object serialization.

The Wapiti-Ruby gem provides a wicked fast linear-chain CRF API for sequence segmentation and labelling. It is based on the codebase of Wapiti.

The x25519 gem is an efficient public key cryptography library for Ruby providing key exchange/agreement via the X25519 (as known as Curve25519) Elliptic Curve Diffie-Hellman function as described in RFC 7748.

Octokit wraps the GitHub API in a flat API client that follows Ruby conventions and requires little knowledge of REST.

Arel is an SQL Abstract Syntax Tree (AST) manager for Ruby. It simplifies the generation of complex SQL queries and adapts to various relational database implementations.

This package provides Ruby support for the HOCON configuration file format. It supports parsing and modifying HOCON and JSON files, and rendering parsed objects back to a String.

This gem removes common margin from indented strings, such as the ones produced by indented heredocs. In other words, it strips out leading whitespace chars at the beginning of each line, but only as much as the line with the smallest margin.

It is acknowledged that many strings defined by heredocs are just code and fact is that most parsers are insensitive to indentation. If, however, the strings are to be used otherwise, be it for printing or testing, the extra indentation will probably be an issue and hence this gem.

This package provides a Ruby library to perform different operations with permutations of sequences, such as strings and arrays.

Em-websocket is an EventMachine based WebSocket server implementation.

Nokogiri (鋸) parses and searches XML/HTML, and features both CSS3 selector and XPath 1.0 support.

Shoulda Matchers provides RSpec- and Minitest-compatible one-liners that test common Rails functionality. These tests would otherwise be much longer, more complex, and error-prone.

Timers offers a collections of one-shot and periodic timers, intended for use with event loops such as async.

The Stud Ruby library adds a few things missing from the standard Ruby library such as:

Stud::Try

Retry on failure, with back-off, where failure is any exception.

Stud::Pool

Generic resource pools.

Stud::Task

Tasks (threads that can return values, exceptions, etc.)

Stud.interval

Interval execution (do X every N seconds).

Stud::Buffer

Batch and flush behavior.

GRPC is a high performance, open-source universal RPC framework. This package provides a ruby interface for it.

The test-queue module is a parallel test runner, built using a centralized queue to ensure optimal distribution of tests between workers. It is specifically optimized for Continuous Integration (CI) environments: build statistics from each run are stored locally and used to sort the queue at the beginning of the next run.

The concurrent-ruby-edge gem includes concurrent-ruby features that are under active development and may change frequently. They are expected not to keep backward compatibility (there may also lack tests and documentation), although semantic versions are obeyed though. Features developed in concurrent-ruby-edge are expected to move to concurrent-ruby when final.