Mail and calendar for Linux and macOS. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust.
⚡ Executive Summary & Quick Facts
Authoritative Sourcepenguin-mail is penguin-mail is an open-source project written in Rust: Mail and calendar for Linux. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of October 2026), c9dev/penguin-mail has accumulated 430 GitHub stars and 20 forks. It is written in Rust, licensed under GPL-3.0, and ranks #11,333 globally. It is actively maintained with the latest commit recorded on Oct 14, 2026.”
| Repository | c9dev/penguin-mail ↗ |
|---|---|
| Primary Category | calendar |
| Language & Stack | Rust |
| Software License | GPL-3.0 |
| Community Traction | ★ 430 stars · ⑂ 20 forks · #11,333 globally |
| Maintenance | ● Active (Last commit: Oct 14, 2026) · 12 open issues |
| Target Audience | Developers and engineering teams building with Rust, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 88/100 · Grade AYes, penguin-mail is actively maintained. Continuous telemetry recorded the last code commit on Oct 14, 2026 (17 days ago). Supported by 430 stars and 20 community forks, this repository holds a calculated health index of 88/100, reflecting regular maintenance (17 days ago) and healthy issue cadence.
Star History
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[](https://githubrepo.cloud/repo/c9dev/penguin-mail?utm_source=readme_chart)Compact badges for your README header. Real-time stars, velocity, health audit, and rank.
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+11
STARS · LAST 30 DAYS
1
PER DAY
#1,101
MOST-STARRED Rust
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +11 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +3 | +10 |
penguin-mail gained 11 stars in the last 30 days, about 1 a day, and now has 430. It is about 1 year old and has averaged roughly 430 stars a year. It ranks #1,101 among Rust repositories and #11,333 across all languages on GitHubRepo.
Trending Record
23
DAYS ON TRENDING
#256
BEST RANK
Oct 7, 2026
FIRST APPEARANCE
Active
STATUS TODAY
penguin-mail has maintained a continuous presence across global trending indexes, peaking at #256. Below is the 30-day activity profile:
💡 Overview
penguin-mail is an open-source project written in Rust: Mail and calendar for Linux. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust.
Engineered for speed, consistency, and developer ease, it solves common hurdles in calendar, email, email-client. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Rust for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ cargo install penguin-mail⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Rust toolchain (rustc / cargo >= 1.70)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
penguin-mail coordinates its core functionality through a modular Rust pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Autonomous AI Agents
Orchestrate intelligent workflows and tool-calling routines with penguin-mail.
Model Inference & Prompting
Integrate fast, local or cloud-hosted generative AI models directly into production code.
Context Memory & RAG
Augment language models with dynamic vector retrieval and structured project memory.
Developer Productivity
Automate repetitive engineering tasks, code generation, and test creation using AI agents.
🚀 Getting Started
Install penguin-mail using your package manager: `cargo install penguin-mail`
Initialize your project workspace or configuration file for penguin-mail.
Import penguin-mail into your codebase or invoke it directly from your terminal.
Execute your test suite or run `penguin-mail --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Rust, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
c9dev/penguin-mail is currently ranked #11,333 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #11,325 | vincode-io/Zavala | Swift | ★ 431 | Compare ↗ |
| #11,325 | microsoft/go | Go | ★ 431 | Compare ↗ |
| #11,325 | holepunchto/pear | JavaScript | ★ 431 | Compare ↗ |
| #11,325 | gfpcom/free-proxy-list | Go | ★ 431 | Compare ↗ |
| #11,325 | anujja/DoNotNotify | Kotlin | ★ 431 | Compare ↗ |
| #11,333 | c9dev/penguin-mail This Project | Rust | ★ 430 | |
| #11,333 | flyerhzm/chinese_pinyin | Ruby | ★ 430 | Compare ↗ |
| #11,333 | inex/IXP-Manager | PHP | ★ 430 | Compare ↗ |
| #11,333 | WikiEducationFoundation/WikiEduDashboard | Ruby | ★ 430 | Compare ↗ |
| #11,333 | SonarSource/sonar-scanner-cli | Java | ★ 430 | Compare ↗ |
| #11,333 | RetroAchievements/RAWeb | PHP | ★ 430 | Compare ↗ |
Frequently Asked Questions
What does penguin-mail do? +
Mail and calendar for Linux and macOS. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust.
Is penguin-mail actively maintained in 2026? +
Yes, penguin-mail is actively maintained. The latest code push was recorded on Oct 14, 2026 (17 days ago). It holds a calculated Maintenance Health Score of 88/100 (A rating) with 430 stars and 12 open issues.
What language is penguin-mail written in? +
The primary language is Rust. Topics include: calendar, email, email-client, gmail, gnome.
How many stars does penguin-mail have? +
penguin-mail has 430 stars and 20 forks on GitHub.
How does penguin-mail rank among GitHub repositories? +
With 430 stars, c9dev/penguin-mail is ranked #11,333 globally across all repositories tracked on GitHubRepo and #1,101 among Rust projects.
What license is penguin-mail distributed under? +
The repository reports a GPL-3.0 license. Always verify the repository LICENSE file for legal terms.
