github.com/rzonedevops/crystalcog
Crystal language implementation of the OpenCog framework. A complete rewrite of the OpenCog artificial intelligence system in Crystal, providing better performance, memory safety, and maintainability.
github.com/le0pard/loudspeaker
Short description of loudspeaker
github.com/aloli-crystal/beryl
Outil Crystal de gestion de configuration FreeBSD, agentless SSH. Provisionne des serveurs FreeBSD 15 (bootstrap via mfsBSD depuis un rescue Linux), puis applique des recettes idempotentes (pkg, service, user, sshd, nginx, etc.).
github.com/R0gu3h3h3h3/oiia
Invidious is an alternative front-end to YouTube
github.com/visorcraft/MongrelDB-Crystal
Pure Crystal HTTP client for MongrelDB - typed CRUD, fluent query builder, idempotent batch transactions, SQL, and schema introspection.
github.com/alexkutsan/AgentKit
AgentKit - Crystal library for building AI agents with MCP (Model Context Protocol) support. Event-based API for integrating LLM agents into your applications.
github.com/Laki0s/NewsCrystal
Tech news scraper and aggregator written in Crystal. Collects articles from several sources (Hacker News, Dev.to, Lobsters) into a single feed exposed through a REST API, a web interface and an RSS/Atom feed.
github.com/Artorys/processo_seletivo_crystal_language
Processo Seletivo Milenio Capital - Code Challenge
github.com/aloli-crystal/toml
TOML v1.0 parser and serializer for Crystal, with comment-and-format preservation across parse → modify → write round-trips. Drop-in replacement for crystal-community/TOML.cr (same TOML.parse_to_hash surface), plus a richer Document AST API for in-place edits that keep the original byte-identical formatting.
github.com/unixfox/invidious-copilot
Invidious is an alternative front-end to YouTube
github.com/worxbend/fluxion.cr
Turn a fresh Linux machine into your machine. One YAML file, one preview, one run. CLI or TUI. A Crystal implementation of the Fluxion workstation bootstrapper.
github.com/aloli-crystal/asciicrystal-diagram
Asciidoctor extension for rendering diagrams by calling external tools (PlantUML, Mermaid, Ditaa, Graphviz, D2, etc.). Crystal port of the asciidoctor-diagram Ruby gem v3.2.1.
github.com/secos/nakiri
A CLI tool for extracting data from web pages using CSS selectors
github.com/mjblack/arr_top
arrtop — a top-like terminal UI for the Sonarr/Radarr download+import pipeline. Sorts the queue by what's actively importing and draws real progress bars, including disk-watched import (copy) progress the *arr API doesn't expose.
github.com/drhuffman12/ai4cr2
Example repo for a Crystal Language project
github.com/hopmesh/hop-sdk-crystal
Embeddable Hop mesh endpoint for Crystal (Sinatra/Rails-shaped) over the libhop C ABI. Your service becomes directly reachable on the mesh, no relay. Zero shards (Crystal binds C directly).
github.com/sdogruyol/yandex-disk-cr
A Yandex.Disk SDK for Crystal. Covers the REST API — metadata, listings, copy/move/delete, chunked resumable uploads and downloads, publishing, custom properties, Trash and background operations — plus an optional directory sync engine and the yandex-disk-sync CLI built on top of it.
github.com/nicferrier/crudi
a Postgres based web Wiki/CMS
github.com/TonyBarbou/invidious_coolify
Invidious is an alternative front-end to YouTube
github.com/plambert/sparse_range.cr
A sorted, coalesced set of integer ranges over any integer type, with a command line tool for building and printing them from the shell.