pure-ruby

SNMP library in ruby (v1, v2c, v3)

Pure Ruby JPEG XL decoder and lossless Modular encoder with no native extensions.

Pure Ruby LR parser generator with racc-compatible grammars, EBNF extensions, diagnostics, and SLR/LALR/LR(1) backends.

Japanese seasonal and lunisolar calendar calculations in Ruby: 24 solar terms, 72 microseasons, observances, new moons, and date conversion.

Ruby Notebook Chronicles Explore Ruby the Interactive Way — Pure Ruby Series

Ruby-native lexer generator for parser authors. Write ordinary Ruby specs, run them at runtime, or generate deterministic Ruby for deployment.

A practical Perl 5 interpreter written in pure Ruby

Swiss QR-bill (QR-Rechnung) parser and reader for Ruby: pure Ruby, no native extensions; reads QR-bills from PDFs and images; MRI, JRuby, TruffleRuby, ruby.wasm

Pure Ruby library and CLI for reading, composing, editing, and writing OpenUSD USDA and USDZ assets.