Local FastImage Resize is an extremely light solution for resizing images in ruby by using libgd.

Reverse geocodes lng, lat pairs into country codes (plus State and Counties within the US). Runs locally, with no external dependancies, and is fast enough for large batch jobs

Runs the Lowess smoothing algorithm

A fast and simple in-place implementation of the luhn check algorithm in Ruby using a C extension.

Lulu merges the closest overlapping pair of map markers into a one whose area is the sum of the original two, located at their centroid. It repeats this until no overlaps remain. Some interesting data structures make this quite fast for all but pathologically bad data. Markers can be circles or squares. The user may provide a scale factor allowing the marker radius to have a different scale than distance between markers.

The LWES Light-Weight Event System is a framework for allowing the exchange of information from many machines to many machines in a controlled, platform neutral, language neutral way. The exchange of information is done in a connectless fashion using multicast or unicast UDP, and using self describing data so that any platform or language can translate it to it's local dialect.

Complete Ruby bindings for LZ4 compression library, including lz4.h, lz4hc.h, and lz4frame.h interfaces. Bundles the official LZ4 source code.

Simple Ruby bindings for NSSpeechSynthesizer.

Spotlight - Ruby interface to Mac OSX Spotlight

Magnetic variation calculation ported from FlightGear

Maps are associative containers which store values, indexed by key, but which provide ordered access to the values, sorted by the key. This implementation wraps the standard implementation found in C++.

Ruby binding for marisa-trie which is a static and space-efficient trie data structure.

implements String#match_at

MAX31855 thermocouple sensor library

An unofficial high-performance Rust-based gem for reading MaxMind DB files. Provides API compatibility with the official maxmind-db gem while leveraging Rust for superior performance. This library is not endorsed by MaxMind.

Generic GeoIP2 lookup tool.

CSS parser/transformer for Mayu Live

This is a native ruby binding to libmdbx, an improved version of the Lightning Memory Mapped Database. libmdbx is an extremely fast, compact, powerful, embedded, transactional key-value database, with permissive license. libmdbx has a specific set of properties and capabilities, focused on creating unique lightweight solutions.

Majordomo - A Ruby binding for libmdp (Majordomo implementation in C)

Ruby bindings for MeCab, a morphological analyzer, with libmecab and naist-jdic so that you can use easily at Heroku