IT Development & R&D based in Tokyo, Japan

We develop and maintain a wide range of open-source tools and libraries, primarily in Go, with a focus on cloud infrastructure, networking, cryptography, and system-level utilities.

Project	Description	Stars
usdpython	Apple's usdzconvert and USD-related tools
reflink	Reflink (copy-on-write) file copy in Go
squashfs	SquashFS read-only implementation in pure Go
magictls	Automatic PROXY, PROXYv2 and TLS support on TCP streams
strftime	strftime with BCP 47 language tag support
weak	Weak reference map for Go 1.18+

Building blocks for cloud-native applications and distributed systems.

• fleet - Fleet cloud system
• clouddb - Decentralized indexed database using LevelDB
• cloudhttp - Easy SSL HTTP server for AWS, GCP, etc.
• cloudinfo - Fetch info on current cloud environment
• seidan - 星団 server cluster project
• lambda - Lambda utilities

Low-level networking tools and protocol implementations.

• magictls - Auto PROXY/PROXYv2/TLS detection on TCP streams
• dns - Modular DNS tools
• slirp - SLiRP networking stack in Go
• pppoeproxy - Simple PPPoE client/server proxy
• rawnet - Raw networking utilities

Secure implementations for authentication, HSM, and post-quantum cryptography.

• hsm - Go support for Hardware Security Modules
• jwt - JWT tokens without external dependencies
• jwttool - Command-line JWT generation tool
• mldsa / slhdsa - Post-quantum signature schemes
• tpmlib - TPM (Trusted Platform Module) support
• vncpasswd - VNC password encryption/decryption

Pure Go implementations for various file system formats.

• squashfs - SquashFS read-only implementation
• iso9660 - ISO9660 image reading and creation
• vfs - Virtual filesystem abstraction
• reflink - Copy-on-write file copy
• gzscan - Scanner for gzip files in disk images

Tools for building multilingual applications.

• strftime - strftime with BCP 47 language tags
• lngdb - Language database for Go
• countrydb - Country database
• currencydb - Currency database
• flagemoji - Flag emoji utilities
• ibanlib - IBAN parsing and generation

Multimedia processing libraries with static linking options.

• avgo - AV library in Go
• ffprobe - FFprobe tools in Go
• hlsmaker - HLS stream creation
• static-opus - Statically linked libopus for Go
• static-portaudio - PortAudio static for Go
• mblur - ImageMagick's motionBlur ported to Go

Parsers and serializers for various data formats.

• pjson - Enhanced JSON with contexts and group resolution
• graphql - GraphQL query parser
• ini - Simple INI file handling
• csscolor - CSS color parser
• tpl - Template engine for Go

Libraries for interacting with hardware devices.

• streamdeck - Elgato StreamDeck API
• hid - Pure Go HID driver (no CGO)
• pixoo64 - Pixoo64 LED display library
• intel-dcapd - Intel DCAP daemon

JavaScript/TypeScript libraries for web development.

• klbfw - KLB framework module for frontend code
• fyvue - Vue library for KLB systems
• react-klbfw-hooks - React hooks for KLB framework
• react-autoruby - Auto ruby tag generation for React
• i18next-klb-backend - i18next backend for KLB systems

Tools for 3D content and Apple's Universal Scene Description format.

• usdpython - Apple's usdzconvert and USD tools (our most starred repo!)

General-purpose Go libraries and tools.

• gsh - Go native shell replacement
• goupd - Auto updater for Go applications
• uhash - Multi-algorithm hashing tool
• bitmap - Bitmap manipulation
• ringbuf - Ring buffer with readers
• weak - Weak reference map (Go 1.18+)
• textutil - Text processing (word wrapping, etc.)
• typutil - Type conversion utilities
• rndstr - Random string generation

Our repositories are predominantly written in:

• Go - ~100 repositories (cloud infrastructure, networking, crypto, utilities)
• JavaScript/TypeScript - Frontend frameworks and React/Vue components
• Rust - Emerging projects (klbfw-rs, minlz-rs, x11anywhere)
• C/C++ - Static library bindings and low-level tools
• Python - USD tools and utilities

We welcome contributions! Each repository has its own contribution guidelines. Feel free to open issues or submit pull requests.

Tokyo, Japan