IT Development & R&D based in Tokyo, Japan

We develop and maintain a wide range of open-source tools and libraries, primarily in Go and increasingly in Rust, with a focus on cloud infrastructure, networking, cryptography, language runtimes, and system-level utilities — often with an emphasis on pure, dependency-free implementations (no CGO, no C, no FFI).

Project	Description	Stars
goro	PHP interpreter implemented in Go
usdpython	Apple's usdzconvert and USD-related tools
teamclaude	Multi-account Claude proxy with quota-based rotation
reflink	Reflink (copy-on-write) file copy in Go
squashfs	SquashFS read/write implementation in pure Go
magictls	Automatic PROXY, PROXYv2 and TLS support on TCP streams
compcol	30+ compression codecs behind one streaming API, pure Rust
cterm	Terminal emulator optimized for AI coding tools
graphitesql	Pure, safe, no_std Rust re-implementation of SQLite
OxideAV	Pure-Rust media transcoding and streaming framework — 140+ codec, container and filter crates
portablesql	Portable SQL toolkit for Go — one codebase for MySQL, PostgreSQL and SQLite

Interpreters, shells, and runtime environments.

• goro - PHP interpreter implemented in Go
• goro-rs - PHP interpreter in Rust
• rustygo - Go → Rust compiler with a Rust runtime (GC, scheduler, channels, reflect) — design stage
• gsh - Go native shell replacement
• nodejs - Node.js factory and pool for Go

Tooling built around AI-assisted development.

• teamclaude - Multi-account Claude proxy with automatic quota-based rotation
• cterm - Terminal emulator optimized for AI coding tools
• mcprun - MCP server runner
• manu - Multipurpose MCP server that gives AI agents hands
• atelier - Minimal-TUI AI coding harness in Rust for OpenAI-compatible APIs
• aipencil - Render structured JSON scene descriptions to deterministic SVG/PNG
• nixvm - Portable sandbox running a real Linux userland by emulating syscalls, not hardware
• bnpm - Sandboxed package manager using Linux namespaces

A growing family of pure-Rust implementations — no C, no FFI, often no_std. See also OxideAV and graphitesql.

Applications & engines

• argus - Web browser written in pure Rust (in-house engine, GUI + headless)
• kataan - High-performance JavaScript engine in pure Rust (interpreter, bytecode VM, x86-64 JIT, WebAssembly)
• z3rs - no_std port of the Z3 theorem prover, no GMP or native deps
• mathesis - Mathematica-style computational notebook running entirely in the browser (live)
• rsurl - Pure-Rust curl — HTTP/1-3, FTP, SFTP, WebSocket, and many more protocols
• httpsd - HTTP/1.1, HTTP/2 and HTTP/3 server with a sans-I/O core and pluggable runtimes
• puressh - SSH library and CLI suite (ssh/sftp/scp/sshd)
• puregit - Git from scratch: object model, packfiles, smart protocol client + server over HTTP and SSH
• fstool - Build, inspect, convert, and repack disk images and filesystems
• origami - Experimental first-principles protein folder (all-atom MD, GPU-accelerated via wgpu)

Systems & toolchain

• kintane - Modular OS kernel, from no-MMU microcontrollers to multi-socket SMP
• purestd - A Rust std that never calls libc — direct kernel syscalls all the way down
• rustlibc - Full libc in Rust with C bindings, a drop-in for glibc or musl
• latticefoundry - Clean-room compiler back-end framework (SSA IR, codegen, object files, linker core)
• qld - Fast parallel linker, drop-in for GNU ld / gold / lld / mold
• rsasm - Multi-target assembler accepting real-world asm syntaxes
• univdreams - Universal decompiler + compiler (ELF, PE, Mach-O round-trip)
• rsemu - Multiplatform emulator built on a generic framework, machines described by config files
• x11anywhere - Portable X11 server with native backends for Linux, macOS and Windows
• fullrust - 100% Rust binaries

Libraries

• purecrypto - Crypto toolkit: classical & post-quantum, X.509, TLS/DTLS/QUIC
• purecrypto-tpm - TPM 2.0 stack speaking the wire protocol directly, no tpm2-tss
• puremp - Arbitrary-precision arithmetic: integers, rationals, MPFR-class floats, polynomials, matrices
• compcol - 30+ compression/decompression codecs behind one uniform streaming API
• minlz-rs - S2 compression, binary-compatible with Go's klauspost/compress/s2
• anydcode - Encode/decode 50+ 1D/2D barcode symbologies (QR, Data Matrix, PDF417, Aztec, App Clip Codes…)
• charcode - WHATWG Encoding Standard character conversion, zero deps, no unsafe
• tomlproc - Complete TOML 1.1.0 parser and serializer, zero deps, no_std
• noroi - Rich curses-style terminal UI with zero external crates
• stipple - Self-drawn, themeable cross-platform UI toolkit (desktop, mobile, web)
• ldtray - Cross-platform tray icons with no compile-time GUI linkage
• rsupd - Signed release distribution and in-place auto-updates (successor to goupd)
• cacrt - no_std curated CA root certificates by OpenSSL subject hash
• psl2 - Fast no_std Public Suffix List with built-in IDNA

Database toolkits and storage engines.

• portablesql - Portable SQL toolkit for Go: write database code once, run it on MySQL / MariaDB, PostgreSQL / CockroachDB and SQLite
  • psql core (struct binding, query builder, transactions, associations) with MySQL, PostgreSQL and SQLite drivers — docs
• graphitesql - Pure-Rust, no_std re-implementation of SQLite, file-format compatible, targets WebAssembly
• pebbledb - Rust port of CockroachDB's Pebble LSM key-value storage engine

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
• lambda - Lambda utilities

Low-level networking tools and protocol implementations.

• magictls - Auto PROXY/PROXYv2/TLS detection on TCP streams
• dns - Modular DNS tools
• pktkit / pktkit-rs - Zero-copy packet toolkit for virtual network topologies — switches, NAT, virtual TCP/IP, WireGuard (Go / Rust)
• slirp - SLiRP networking stack in Go
• pppoeproxy - Simple PPPoE client/server proxy
• spotlib / spotlib-rs - Spot end-to-end encrypted messaging protocol client (Go / Rust)
• smartremote - Transparent partial HTTP file access with caching and resume

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
• authenticode - Pure-Go Authenticode signing for Windows PE files (no CGO)
• gosigner - Remote Authenticode signing with a USB token over the Spot network
• lnp22 - Lattice-based NIZK proof framework (LNP22, CRYPTO 2022)
• anyhash - 60 hash algorithms selected by name, with cloneable state
• tmpsecfile - Anonymous, encrypted-at-rest temporary files for Go
• tpmlib - TPM (Trusted Platform Module) support
• vncpasswd - VNC password encryption/decryption

Multi-chain wallet infrastructure, signing, and cryptographic primitives.

• libwallet - Multi-chain mobile wallet library with TSS — Ethereum, Bitcoin, Solana, NFTs
• tss-lib / tsslib-rs - Threshold signature schemes, wire-compatible (Go / Rust)
• outscript / outscript-rs - Output scripts, addresses and transaction signing across many networks (Go / Rust)
• ethrpc / ethrpc-rs - Ethereum JSON-RPC client (Go / Rust)
• erigon-seg - Read, query, write and merge Erigon 3 seg state files
• chiefsplitter - Solana program for configurable fee splitting
• secp256k1 / edwards25519 - Elliptic curve primitives
• base58 / bech32m - Address encodings
• blindsig - Blind signatures

Pure Go implementations for various file system and archive formats.

• squashfs - SquashFS read/write implementation
• iso9660 - ISO9660 image reading and creation
• vfs - Virtual filesystem abstraction
• reflink - Copy-on-write file copy
• gobzip2 - Pure Go bzip2 compression/decompression with parallel support
• gzscan - Scanner for gzip files in disk images

Multimedia processing libraries — pure Rust and pure Go, no C dependencies where possible.

• OxideAV - Pure-Rust media transcoding and streaming — no C libraries, no FFI, every format implemented clean-room from the spec
  • 140+ crates: video (H.264/H.265/H.266, AV1, VP8/VP9, ProRes…), audio (AAC, Opus, FLAC, MP3, AC-3, DTS…), images (PNG, WebP, JPEG XL, AVIF, HEIF…), containers (MP4, Matroska, Ogg…) and subtitles
  • The oxideav CLI and oxideplay player ship from oxideav-workspace; use crates individually or all at once via oxideav-meta
• avgo - AV library in Go
• ffprobe - FFprobe tools in Go
• hlsmaker - HLS stream creation
• goavif - AVIF codec in pure Go (no CGO)
• gowebp - Pure-Go WebP encoder (no CGO)
• static-opus - Statically linked libopus for Go
• static-portaudio - PortAudio static for Go
• gogd - PHP gd image operations in native Go (no cgo, no libgd)
• 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
• gopcre2 - Pure Go PCRE2 (Perl-compatible regex), no CGO
• gomailparse - Streaming MIME email parser for Go
• ini - Simple INI file handling
• csscolor - CSS color parser
• tpl - Template engine for Go

Tools for building multilingual applications.

• strftime - strftime with BCP 47 language tags
• strtotime / strtotime-rs - PHP-compatible strtotime() (Go / no_std Rust)
• gotz / timezone-data-rs - Raw IANA timezone data, embedded (Go / Rust)
• goicu / intlrs - ICU-compatible features: transliteration, collation, normalization (Go / no_std Rust)
• lngdb - Language database for Go
• countrydb - Country database
• currencydb - Currency database
• flagemoji - Flag emoji utilities
• ibanlib - IBAN parsing and generation

Libraries for interacting with hardware devices.

• streamdeck - Elgato StreamDeck API
• hid - Pure Go HID driver (no CGO)
• pixoo64 - Pixoo64 LED display library
• usbmagic - Library and CLI for programmable USB test instruments (Cynthion), with FPGA gateware
• selecard - Reverse-engineered protocol and tool for the SeleCard III 426 MHz garage remote
• intel-dcapd - Intel DCAP daemon

JavaScript/TypeScript libraries for web development.

• klbfw - KLB framework module for frontend code (also in Rust and Swift)
• 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 Python repo!)

General-purpose Go libraries and tools.

• goupd - Auto updater for Go applications
• uhash - Multi-algorithm hashing tool
• xuid / xuid-rs - Type-prefixed, base32-encoded UUIDs (Go / Rust)
• unison - Coalescing duplicate function calls with generics and caching
• 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 240+ repositories are predominantly written in:

• Go - Cloud infrastructure, networking, crypto, language runtimes, and utilities, including portablesql
• Rust - A fast-growing pure-Rust ecosystem (browser, JS engine, SQLite, kernel, toolchain, crypto, networking), including the OxideAV media stack
• JavaScript/TypeScript - Frontend frameworks and React/Vue components
• C/C++ - Static library bindings and low-level tools
• Python - USD tools and analysis utilities

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

Tokyo, Japan