Open source. Open possibilities.

Turso Database is an in-process SQL database written in Rust and compatible with SQLite, adding an experimental PostgreSQL frontend, multi-language bindings, MVCC concurrency, change data capture and vector support.

Open-source disassembly framework written in pure C, supporting 20+ architectures including x86, ARM, AArch64, RISC-V, MIPS and PowerPC, with a clean architecture-neutral API, multi-language bindings, and detailed instruction semantics for binary analysis and reverse engineering.

Synth is an ahead-of-time WebAssembly-to-native compiler targeting ARM Cortex-M/R, RISC-V RV32IMAC and AArch64, with Rocq mechanized correctness proofs and SMT translation validation. Pre-release, embedded-focused, Apache-2.0.

Pyodide is a Python distribution for the browser and Node.js based on WebAssembly.

Wasmtime is a standalone WebAssembly runtime from the Bytecode Alliance, built on the Cranelift code generator. It offers fast execution, a security-focused design, configurable resource limits, WASI support and standards compliance, with embedding APIs for Rust, C, C++, Python, .NET, Go and Ruby.

Kotoba is a security-first, declarative language and computing stack for AI agents that enforces capability-safe execution, post-quantum cryptography by default, content-addressed artifacts, and explicit authority boundaries to confine untrusted code.

Leptos is a full-stack, isomorphic Rust web framework using fine-grained reactivity to build declarative UIs with SSR, hydration, and server functions.

A 3D software rasterizer built from scratch in C99, supporting multiple platforms including desktop and WebAssembly.

raylib is a simple, easy-to-use C library for videogame programming, ideal for prototyping, education, and graphical applications.

Official Kotlin repository: JetBrains' concise multiplatform programming language, with compiler, standard library, Gradle build automation, Kotlin/Native support, and contributor guidelines.

Tesseract.js is a JavaScript OCR library that extracts text from images in over 100 languages. It runs in browsers via WebAssembly and on Node.js, wrapping the Tesseract engine without modifying its recognition model.

Bootstrap Blazor is an enterprise-level UI component library for Blazor, built on Bootstrap and maintained as a .NET Foundation project. It ships as the NuGet package BootstrapBlazor, with online examples, a CLI project template and documented setup steps for server, WebAssembly and layout integration.

Harper is an offline, privacy-first English grammar checker built in Rust. It lints documents in milliseconds with a tiny memory footprint, unlike cloud-based or resource-heavy alternatives.

ThunderForgeVTT is an open-source virtual tabletop built with Rust and WebAssembly, currently in early concept/PoC stage, aiming for easy hosting and a fantasy-friendly experience.

Bundle is a privacy-first web toolkit providing PDF, image, developer, and text tools that run entirely in the browser without server uploads.

SafeMesh provides formally verified CRDTs (G-Set, G-Counter, OR-Set, etc.) using Lean 4 proofs and no_std Rust. It offers C, WASM/TS, and Python bindings for small, embeddable state synchronization, requiring users to provide their own transport layer.

A curated collection of Blazor resources including templates, sample projects, tutorials, libraries, videos, articles, podcasts, books, courses, and community links for .NET web developers.

Wago is a pure-Go WebAssembly runtime that compiles Wasm to native machine code without CGO. WASI, the Component Model and other host capabilities are delivered as plugins, and .wasm files can be built into small standalone executables.

An open-source developer platform for building native cross-platform .NET applications for Web, Desktop, Mobile, and Embedded systems from a single C#/XAML codebase.

Official LottieFiles web player for Lottie (.json) and dotLottie (.lottie) animations, with a Rust + WASM core, Canvas2D/WebGL2/WebGPU backends, runtime theming, state machines, audio, worker rendering, and React, Vue, Svelte, Solid and Web Component SDKs.