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AddThe open-source app generator powered by Convex. Generate realtime full‑stack apps. The only AI app builder that knows backend.
Chef is the only AI app builder that knows backend. It builds full-stack web apps with a built-in database, zero config auth, file uploads, real-time UIs, and background workflows. If you want to check out the secret sauce that powers Chef, you can view or download the system prompt here.
Structured data is a way for search engine machines to make sense of content in your HTML. Google and other search engines created a structured data standard called schema.org. If you're like most web designers or SEOs, you might find schema.org a little difficult to grasp at first. That's why we created Schema Creator—to help you quickly build and get started with schema.org microdata.
SchemaSpy is a Java-based tool (requires Java 5 or higher) that analyzes the metadata of a schema in a database and generates a visual representation of it in a browser-displayable format. It lets you click through the hierarchy of database tables via child and parent table relationships as represented by both HTML links and entity-relationship diagrams. It's also designed to help resolve the obtuse errors that a database sometimes gives related to failures due to constraints.
Each entry has about 42 bits of randomness. Queries are not recorded. Randomness is probably as good as the random resource in the operating system.
Image and Video Hosting Software. Your own image and video sharing platform. Create your own Flickr/Imgur-style media sharing platform with full control over your content and rules.
Chevereto is a powerful image and video hosting script that allows you to create a beautiful media hosting website with all the features you need.
Parser Building Toolkit for JavaScript.
Chevrotain is a blazing fast and feature rich Parser Building Toolkit for JavaScript with built-in support for LL(K). Grammars and 3rd party plugin for LL(*) grammars. It can be used to build parsers/compilers/interpreters for various use cases ranging from simple configuration files, to full-fledged programing languages.
Chiasmodon is an OSINT tool designed to assist in the process of gathering information about a target domain. Its primary functionality revolves around searching for domain-related data, including domain emails, domain credentials, CIDRs , ASNs , and subdomains, the tool also allows users to search Google Play application ID.
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chibisafe is a beautiful and performant vault to save all your files in the cloud.
A modern and self-hosted take on file uploading services that can handle anything you throw at it thanks to it's robust and fast API, chunked uploads support and more.
Chicory, a JVM native WebAssembly runtime.
Chicory is a JVM native WebAssembly runtime. It allows you to run WebAssembly programs with zero native dependencies or JNI. Chicory can run Wasm anywhere that the JVM can go. It is designed with simplicity and safety in mind. See the development section for a better idea of what we are trying to achieve and why.
A web-based 3D CAD application for online model design and editing.
Chili3D is an open-source, browser-based 3D CAD (Computer-Aided Design) application built with TypeScript. It achieves near-native performance by compiling OpenCascade (OCCT) to WebAssembly and integrating with Three.js, enabling powerful online modeling, editing, and rendering—all without the need for local installation.
Hot Chocolate is an open-source GraphQL server for the Microsoft .NET platform that is compliant with the newest GraphQL October 2021 spec + Drafts, which makes Hot Chocolate compatible to all GraphQL compliant clients like Strawberry Shake, Relay, Apollo Client, and various other GraphQL clients and tools.
Hot Chocolate takes the complexity away from building a fully-fledged GraphQL server and lets you focus on delivering the next big thing.
A modern, general-purpose Linux distribution.
Chimera is a general-purpose Linux-based OS born from unhappiness with the status quo. We aim to create a system that is simple, transparent, and easy to pick up, without having to give up practicality and a rich feature set. Chimera uses a novel combination of core tools from FreeBSD, the LLVM toolchain, and the Musl C library, delivering a fresh experience with several major benefits.
It is built from scratch using novel tooling, approaches, and userland. Instead of intentionally limiting ourselves, we strive to achieve both conceptual simplicity and convenience with careful and high quality software design.
Bringing the console gaming experience to PC. A Steam Big Picture based couch gaming OS
AUDIO DATA TRANSMISSION. Send data with sound .
This application allows you to transmit and receive data through sound. It uses a simple encoding scheme to convert text into audio frequencies, which can be played through your speakers and picked up by a microphone.
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Secure peer-to-peer chat that is serverless, decentralized, and ephemeral.
Chitchatter is a free (as in both price and freedom) communication tool. Designed to be the simplest way to connect with others privately and securely.
photos without a server.
Smriti indexes any drive, recognises faces on-device, and surfaces memories — without leaving your machine. No account, no cloud, no server humming in a closet.
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Yet another pastebin.
Chiyogami is a sleek, modern pastebin with encryption, customizable expiry, private pastes, user accounts and an API for developers. 🚀
Git Worktree TUI.
LazyWorktree lets you create, switch, and manage Git worktrees from a keyboard-driven TUI. It shows PR status, CI checks, and diffs alongside your worktree list.
View the source of this page for an example of how to implement a lightweight preview image for YouTube videos that is resilient to image load failures. There is no iframe on this page at load time. The iframe is only created when the user clicks the preview.
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Choices.js is a lightweight, configurable select box/text input plugin. Similar to Select2 and Selectize but without the jQuery dependency.
All the AI, on your Mac.
Chat with o3, Claude, Gemini, DeepSeek, and others all at once. The best models, as soon as they come out, in one open source app.
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Open Source ClickHouse Web UI with RBAC. Free & Self-Hosted.
What started as a single-connection console grew into the combination most ClickHouse tools only do a piece of — first-class RBAC, multi-cluster fleet monitoring, and an autonomous AI SRE that finds the root cause and writes the fix. Read-only. On-prem. Yours.
Bash's powerful command line editing in cmd.exe
Clink combines the native Windows shell cmd.exe with the powerful command line editing features of the GNU Readline library, which provides rich completion, history, and line-editing capabilities. Readline is best known for its use in the Unix shell Bash, the standard shell for many Linux distributions.
Your AI Meeting Copilot (Early Preview)
Take the hassle out of meetings with Amurex, the ultimate Chrome extension that transforms how you manage and stay productive during meetings.
Amurex is your simple yet powerful AI meeting assistant that seamlessly integrates into your workflow. Built with cutting-edge AI, Amurex ensures you never miss a detail, always stay on top of action items, and make every meeting more productive.
Lacros is an architecture project to decouple the Chrome browser from the Chrome OS window manager and system UI. The name comes from Linux And ChRome OS.
Self-hosted personal gallery application with online photo management and albums, supporting Live/Motion Photos, EXIF parsing, geolocation recognition, and an explore map.
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chrony is a versatile implementation of the Network Time Protocol (NTP). It can synchronise the system clock with NTP servers, reference clocks (e.g. GPS receiver), and manual input using wristwatch and keyboard. It can also operate as an NTPv4 (RFC 5905) server and peer to provide a time service to other computers in the network.
Your ClickHouse, one workspace.
SQL editor, dashboards, pipelines, query analytics, cluster monitoring, governance, and an AI copilot — one single binary, on your infrastructure. Open source at its core. Pro is a license key, not a subscription to someone else's servers.
Discord AnalyticsMade Simple
Cially is an open-source Discord Server Stats dashboard that provides real-time insights, member activity tracking, and detailed server statistics to help you understand and optimize your Discord community.
🪼Cially is a powerful, open-source dashboard designed to provide in-depth insights, real-time analytics, and detailed statistics for your Discord server. Monitor member activity, track engagement trends, and make data-driven decisions with ease.
Think EDR, but for CI/CD Pipelines. Open-source eBPF-powered runtime security sensor for GitHub Actions and GitLab CI/CD.
AI agent rules / skills distilled from software engineering books. Inspired by Clean Code, Refactoring, DDD, Clean Architecture and DDIA programming books.
Markdown rule sets for coding agents. Use mini or full as focused skills when a task needs a book's decision pressure, and keep nano for tiny always-on context.
Linux Native, API-Aware Networking and Security for Containers. eBPF-based Networking, Observability, Security.
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. It provides a simple flat Layer 3 network with the ability to span multiple clusters in either a native routing or overlay mode. It is L7-protocol aware and can enforce network policies on L3-L7 using an identity based security model that is decoupled from network addressing.
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An open-source RAG-based tool for chatting with your documents.
An open-source clean & customizable RAG UI for chatting with your documents. Built with both end users and developers in mind.
This simple tool helps save a lot of time when gathering information on social networks. Enter your search query once and click the buttons with the names of social media platforms, to quickly jump to pages to find posts that match your query. Quick hastags search @ GitHub.
This simple tool helps save a lot of time when gathering information about geolocation. Enter latitude and longitude (or choose location on map) once and click the buttons with the names of online maps, to quickly jump to it.
A scalable file analysis and data generation platform that allows users to easily orchestrate arbitrary docker/vm/shell tools at scale.
Thorium is a highly scalable, distributed malware analysis and data generation framework. Thorium is designed to make cyber incident response, triage, and file analysis easier through the safe ingestion and storage of data, automation of analyses and easy access to stored analyses and metadata. Because of the sensitivity and potential maliciousness of data handled within Thorium, uploaded files are placed into an encrypted/neutered format called CaRT. After initial file upload, all analysis is conducted in sandboxed environments where protective measures and sanitization steps can be easily applied.
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Enterprise governance for AI agents — scan, enforce, and audit every skill, MCP server, and plugin before it runs.
DefenseClaw is the enterprise governance layer for OpenClaw. It sits between your AI agents and the infrastructure they run on, enforcing a simple principle: nothing runs until it's scanned, and anything dangerous is blocked automatically.
Ephemeral GitHub Runners with Secure Multi-Tenant Isolation.
ForgeMT is a secure, scalable GitHub Actions runner platform for ephemeral workloads. Designed for multi-tenant environments, it automates isolated runner provisioning on Kubernetes or EC2, with built-in OIDC, IAM, cost optimization, and deep observability.
Lynis is an open source security auditing tool. Commonly used by system administrators, security professionals and auditors, to evaluate the security defenses of their Linux/Unix based systems. It runs on the host itself, so it performs more extensive security scans than vulnerability scanners.
Security auditing tool for Linux, macOS, and Unix-based systems.
Lynis is a battle-tested security tool for systems running Linux, macOS, or Unix-based operating system. It performs an extensive health scan of your systems to support system hardening and compliance testing. The project is open source software with the GPL license and available since 2007.
Welcome to the open source Citation Style Language (CSL) project! Our goal is to facilitate scholarly publishing by automating the formatting of citations and bibliographies. We develop the Citation Style Language and maintain a crowdsourced repository with over 10,000 free CSL citation styles.
Nintendo 3DS Emulator.
Citra is an open-source emulator for the Nintendo 3DS capable of playing many of your favorite games.
A TypeScript superset that favors more types and less typing.
A Programming Language for the New Millenium. Code More with Less in a TypeScript Superset.
Civet is a programming language that compiles to TypeScript or JavaScript, so you can use existing tooling (including VSCode type checking, hints, completion, etc.) while enabling concise and powerful syntax. It starts with 99% JS/TS compatibility, making it easy to transition existing code bases. Then it adds many features and syntactic sugar, with some highlights below and more comprehensive examples in the reference.
Open source constituent relationship management for non-profits, NGOs and advocacy organizations.
Internal Tools Deployment Platform. Webapp Management for Internal Tools.
Platform for securely developing and deploying web tools across a team. Application server for containerized webapps. Create and share webapps for CLI applications.
Clace combines the functionality of a reverse proxy, a hypermedia based micro-framework and a container orchestrator (using Docker or Podman) in a single lightweight binary. After starting the Clace server and ensuring Docker or Podman is running, new apps can be installed in one command from GitHub source repo. Clace builds the image and starts the container lazily, on the first API call. Clace can also automatically build simple form based UI for backend APIs.
C Language Family Frontend for LLVM.
The Clang project provides a language front-end and tooling infrastructure for languages in the C language family (C, C++, Objective C/C++, OpenCL, and CUDA) for the LLVM project.
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AI Image Upscaler & Enhancer - Magnific Alternative. Upscale your images with AI Magic.
ClarityAI is a high resolution upscaler which also can enhance your images and add details. You can decide how much you want the AI to add details to your images.
Clarity with every click. Clarity is a free product that captures how people use your site. Setup is easy and you'll start getting data in minutes.
Open source Sonic the Hedgehog for the browser.
Open Sonic is a free open-source game based on the "Sonic the Hedgehog" universe. It introduces a different style of gameplay called cooperative play, in which it's possible to control 3 characters simultaneously. Unlike most similar games, Open Sonic provides a greater level of interaction between the player and the levels. It's more than just a jump'n'run; the user must come up with some strategy in order to get through the levels.
Naming things needn’t be hard. Find inspiration for naming things – be that HTML classes, CSS properties or JavaScript functions – using these lists of useful words.
Automate your course and focus on teaching.
Managing and organizing your class is easy with GitHub Classroom. Track and manage assignments in your dashboard, grade work automatically, and help students when they get stuck— all while using GitHub, the industry-standard tool developers use.
The Open Source Education Platform. A Simple and Beautiful Alternative to Moodle LMS
Every ad account.One command line. Free PPC & Google Ads Audit Tool.
12 platforms, 33 skills, one /ads command. Read-only by default, every finding backed by evidence.
Claude-first paid-media operations skill for Claude Code across 12 ad platforms (Google, Meta, YouTube, LinkedIn, TikTok, Microsoft, Apple, Amazon, Reddit, Pinterest, Snapchat, X): source-grounded audits, deterministic scoring, versioned JSON reports, and capability-gated account changes.
Claude Ads turns authorized exports or account reads into source-grounded audits, plans, creative workflows, experiments, monitoring, and reports. It is read-only by default. Live changes stay disabled until the exact platform and operation pass approval, idempotency, verification, audit, and rollback gates.
AI Coding Agent, Terminal, IDE.
Work with Claude directly in your codebase. Build, debug, and ship from your terminal, IDE, Slack, or the web. Describe what you need, and Claude handles the rest.
Related contents:
- Claude Code Cheat Sheet.
- Claude Code Essentials @ freeCodeCamp.org's YouTube.
- How I'm Productive with Claude Code @ Neil Kakkar.
- Auto mode for Claude Code @ Simon Willison's Weblog.
- Inside the Claude Code source @ Haseeb Qureshi's GitHub Gist.
- Entire Claude Code CLI source code leaks thanks to exposed map file @ Ars Technica.
- Reading leaked Claude Code source code @ Vita Nouva.
- The Claude Code Source Leak: fake tools, frustration regexes, undercover mode, and more @ Alex Kim's blog.
- What's cch? Reverse Engineering Claude Code's Request Signing.
- How Claude Code Builds a System Prompt @ dbreunig.com.
- Fuite Claude Code - 6 trucs à piquer pour vos hooks @ Korben :fr:.
- Leveling Up Secure Code Reviews with Claude Code @ SpecterOps.
Universal SEO skill for Claude Code. 25 sub-skills + 18 sub-agents covering technical SEO, E-E-A-T, schema, GEO/AEO, backlinks, local SEO, maps intelligence, semantic clustering, e-commerce SEO, international SEO, Google APIs, and PDF/Excel reporting. Optional DataForSEO, Firecrawl, and Banana extensions.
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⚡️ Superpowers for your Openclaw. Powerful prebuilt agent workflows. Including 113 prebuilt workflows you can enable in 1 click 🎉
The security firewall for agents.
Give agents prod access and still sleep easy
Claw Patrol holds agent credentials, parses their traffic at the wire, and gates actions they take with rules you write, all while keeping an audit log of every action.
Remove objects, people, text and defects from any picture for free