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Top 23 Crystal HacktoberFest Projects
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Did you ever see Crystal? It's more or less a typed Ruby. I've heard that you can port some code directly.
https://crystal-lang.org/
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InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
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If you're running or using Invidious [1] - a YouTube proxy service - you're running or using Crystal.
[1] https://github.com/iv-org/invidious
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lucky
A full-featured Crystal web framework that catches bugs for you, runs incredibly fast, and helps you write code that lasts.
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Collision
Check hashes for your files - A GUI tool to generate, compare and verify MD5, SHA-1, SHA-256, SHA-512, Blake3, CRC32 & Adler32 hashes. (by GeopJr)
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CodeRabbit
CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
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carbon
Email library for Crystal. Testable, adapter-based, and catches bugs for you. Comes with an adapter for SendGrid. (by luckyframework)
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zipstream
A command line tool that allows you to easily share files and directories over the network (by mamantoha)
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Crystal HacktoberFest discussion
Crystal HacktoberFest related posts
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Google Ordered to Identify Who Watched Certain YouTube Videos
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Crystal 1.11.0 Is Released
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Choosing Go at American Express
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What languages are useful for contribution to the GNOME project.
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A note from our sponsor - InfluxDB
influxdata.com | 28 Apr 2025
Index
What are some of the best open-source HacktoberFest projects in Crystal? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | crystal | 19,744 |
| 2 | Invidious | 17,162 |
| 3 | lucky | 2,631 |
| 4 | List-All-Programming-Telegram-Group | 1,423 |
| 5 | crest | 239 |
| 6 | avram | 167 |
| 7 | Collision | 163 |
| 8 | duktape.cr | 137 |
| 9 | Cable | 129 |
| 10 | spectator | 102 |
| 11 | carbon | 85 |
| 12 | habitat | 84 |
| 13 | schedule.cr | 74 |
| 14 | crytic | 67 |
| 15 | zipstream | 59 |
| 16 | blueprint | 59 |
| 17 | shards.info | 39 |
| 18 | scar | 28 |
| 19 | crinder | 28 |
| 20 | bitfields | 27 |
| 21 | HardWire | 21 |
| 22 | lens | 16 |
| 23 | crie | 12 |
Sponsored
InfluxDB high-performance time series database
Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
influxdata.com