CrustJSONEncoder is a JSON encoder for Ruby on Rails.

A simple stash

CSV based Ruby decision tables.

Cuckoo Filter implementation in Ruby

method decorator

An implementation of SipHash 1-3, 2-4, etc. in pure Ruby.

DotKey provides an elegant way to read, write, and manipulate deeply nested Hashes and Arrays using dot-delimited strings. It supports wildcards for pattern matching, custom delimiters, and flexible handling of missing values - making it ideal for working with complex data structures, configuration objects, and API responses.

Edit distance algorithms including Levenshtein, Restricted Edit (Optimal Alignment) and Damerau-Levenshtein distances, and Jaro & Jaro-Winkler similarity.

EncodeM v3.0 brings complete M language (MUMPS) subscript encoding to Ruby, supporting numbers, strings, and composite keys with perfect sort order. Build hierarchical database keys like M("users", 42, "email") that sort correctly as raw bytes. This 40-year production-tested algorithm from YottaDB/GT.M powers Epic (70% of US hospitals) and VistA. Perfect for B-tree indexes, key-value stores, and any system requiring sortable hierarchical keys. All types maintain correct ordering when compared as byte strings - no decoding needed.

Prints origin of a word

ROM-compatible data mapper

Active Support impelementation in C for the ones who need for speed.

an attempt at a fast_blank for JRuby

A simple example of how to write a Ruby native extension in OCaml

Serialize and deserialize Open Sound Control messages using rtosc

A faster implementation of getting the current local 4 digit year.

Fast Base64 C extension

libhydrogen + encoding = cryptographically sound, URL safe string = libhydrogen + encoding

Extends Ruby FFI and uses LLVM to generate JIT wrappers for attached native functions. Works only on MRI

radix tree implementation in c++ with FFI bindings