# Nguyen Cong Hoang

> Nguyen Cong Hoang is a software engineer in Vietnam who builds small, fast tools for macOS, Windows and home networks, and tinkers with electronics on the side.

afixer.app is the personal site of Nguyen Cong Hoang (Nguyễn Công Hoàng, GitHub: openhoangnc).
It lists his open-source projects, hosts the JOKey Vietnamese input method for macOS, and publishes his writing.

## Pages

- [About](https://afixer.app/about): who he is, what he builds and how to reach him
- [Projects](https://afixer.app/projects): all projects grouped by category
- [Writing](https://afixer.app/blog): blog posts ([RSS](https://afixer.app/rss.xml))

## JOKey (Vietnamese input method for macOS, documentation in Vietnamese)

- [JOKey overview](https://afixer.app/jokey): features, screenshots and FAQ
- [Install JOKey](https://afixer.app/jokey/install): one-line install command `curl -sS https://afixer.app/jokey/install.sh | sh`, version history
- [User guide](https://afixer.app/jokey/manual): typing without underline, exclusion list, Secure Input, shortcuts, SIP & Gatekeeper
- [Uninstall JOKey](https://afixer.app/jokey/manual/uninstall): `curl -sS https://afixer.app/jokey/uninstall.sh | sh`
- [Privacy](https://afixer.app/jokey/privacy): JOKey runs in the macOS App Sandbox and collects no data

## Projects

- [JOKey](https://afixer.app/jokey): JOKey is a free Vietnamese input method (Telex and VNI) for macOS 11+. It integrates with Input Sources, supports typing without underline, and runs in the macOS sandbox. Platforms: macOS.
- [Taskbar Stats](https://afixer.app/projects/taskbar-stats): Taskbar Stats is a tiny, zero-configuration Windows utility that shows network speed, CPU and RAM usage on the taskbar, updated every second. Platforms: Windows 10, Windows 11. GitHub stars: 522 (as of 2026-09-30).
- [Sift](https://afixer.app/projects/sift): Sift is a network-wide DNS ad and tracker blocker written in Rust. Plain DNS, DoT, DoH, DoQ and HTTP/3 in one 10 MB static binary, with a web interface. Platforms: Linux, macOS, Docker. GitHub stars: 1 (as of 2026-09-30).
- [Lightspot](https://afixer.app/projects/mac-lightspot): Lightspot is a lightweight, pixel-perfect macOS Spotlight replacement in pure Swift. No file indexing, under 1 ms search, 0% idle CPU, with built-in developer tools. Platforms: macOS. GitHub stars: 5 (as of 2026-09-30).
- [CleanDevMac](https://afixer.app/projects/cleandevmac): CleanDevMac (cdm) is a terminal UI for macOS that reclaims disk space from dev caches, build artifacts and orphaned app data. Pure bash, no install, no telemetry. Platforms: macOS.
- [MacStats](https://afixer.app/projects/mac-stats): MacStats is a lightweight native macOS menu bar monitor written in Swift. It shows network speed, CPU and RAM usage and CPU temperature in real time. Platforms: macOS 11+. GitHub stars: 4 (as of 2026-09-30).
- [Claude Usage Stats](https://afixer.app/projects/claude-usage-stats): Claude Usage Stats is a tiny macOS menu bar app that shows your Claude Code session and weekly usage at a glance, with reset times and a pace marker. Platforms: macOS. GitHub stars: 6 (as of 2026-09-30).
- [SpeedMaster for YouTube](https://afixer.app/projects/small#speed-master): SpeedMaster for YouTube adjusts video playback speed per channel and remembers your preferred quality. Available for Chrome and on the Mac App Store. Platforms: Chrome, macOS.
- [NoMacMusic](https://afixer.app/projects/small#nomacmusic): NoMacMusic stops the macOS Music app from auto-launching when Bluetooth headphones connect. No GUI, no configuration, 0% CPU and about 7 MB of RAM. Platforms: macOS. GitHub stars: 15 (as of 2026-09-30).
- [HTTP Header Modifier](https://afixer.app/projects/small#http-header-modifier): HTTP Header Modifier is a Chrome extension for adding, changing or removing HTTP request headers on URLs that match your patterns. Useful for testing APIs and staging sites. Platforms: Chrome.
- [setup-zsh](https://afixer.app/projects/setup-zsh): setup-zsh is a lightweight one-command Zsh setup for macOS with history-wide autosuggestions, syntax highlighting, a Git-aware prompt and a dev tools installer. Platforms: macOS. GitHub stars: 3 (as of 2026-09-30).
- [VietQR](https://afixer.app/projects/vietqr): VietQR generator and zero-dependency TypeScript library (vietqr-zero) for Vietnamese bank transfer QR codes. No backend, no tracking, no cookies. Platforms: Web, npm. GitHub stars: 10 (as of 2026-09-30).
- [KDict](https://afixer.app/projects/small#kdict): KDict là bộ từ điển Anh–Việt và Nhật–Việt cho máy đọc sách Kindle, tra được từ có biến đổi s/es, ing, ed và Hiragana, Katakana, Kanji. Platforms: Kindle. GitHub stars: 5 (as of 2026-09-30).

## Mirrors (files by other authors, kept available)

- [LiteVNA archive](https://afixer.app/projects/small#litevna): A mirror of the LiteVNA vector network analyzer firmware and PC software, kept so the files stay available when the original download folder changes. Platforms: LiteVNA. GitHub stars: 27 (as of 2026-09-30).
- [FNIRSI 2C23T archive](https://afixer.app/projects/small#fnirsi-2c23t): A backup of the manual and firmware for the FNIRSI 2C23T handheld oscilloscope and multimeter, kept for owners who need to reflash or look something up. Platforms: FNIRSI 2C23T. GitHub stars: 12 (as of 2026-09-30).

## Writing

- [Rebooting afixer.app](https://afixer.app/blog/rebooting-afixer-app) (2026-09-30): afixer.app is now my personal site, rebuilt as fully static pages with Astro. No analytics, no tracking, and the JOKey installer no longer reports anything.

## Elsewhere

- [GitHub](https://github.com/openhoangnc)