dev tools
image compressors, code snippet renderers, diffing tools -- the small utilities that save ten minutes a day.
Transitions.dev
A collection of essential UI transitions for web apps that can be copied and pasted or used with coding agents.
PlayCanvas
PlayCanvas is an open-source game engine that allows users to create 3D games and visualizations using WebGL and WebGPU, making it useful for developers in game design.
OpenClaude
An open-source coding agent that operates in your terminal, allowing interaction with various AI models like OpenAI and GitHub Models.
Free Public APIs
A collection of free public APIs for developers and students, tested daily for reliability and ease of use.
Recordly
Recordly is an open-source screen recorder for multiple operating systems, featuring auto-zoom and animated cursors, ideal for creating demos and walkthroughs.
Homepage
Homepage is a customizable application dashboard that integrates with over 100 services, providing a fast and secure way to manage your applications.
Proxmox Server Solutions
Proxmox offers open-source server solutions including virtualization, backup, and mail gateway platforms, useful for managing IT infrastructure efficiently.
Awesome Go
A curated list of Go frameworks, libraries, and software, regularly updated and community-driven, making it easier to find useful Go resources.
Uptime Kuma
A self-hosted monitoring tool that tracks the uptime of your services and websites, helping you ensure they are always available.
Syncthing
Syncthing is an open-source file synchronization tool that allows you to sync files between devices securely and privately without relying on cloud services.
OpenHands
OpenHands is an open-source platform for cloud coding agents that automates engineering tasks securely and transparently.
Usertour
Usertour is an open-source platform for creating in-app user onboarding experiences like tours, checklists, and surveys, with options for AI assistance.
CLI-Anything
CLI-Anything is a GitHub project that aims to make all software agent-native, enhancing command-line interfaces for better integration and usability.
PicSmaller
Compress and resize images in various formats directly in your browser, with batch processing and local handling for privacy.
Infisical
Infisical is a platform for managing identities, secrets, and access for developers and AI agents, enhancing security in software development.
Agent Orchestrator
Manage a fleet of coding agents while tracking branches, reviews, and CI failures. It's free and open source under Apache 2.0.
VirusTotal
VirusTotal allows users to upload files and URLs to check for viruses and malware using multiple antivirus engines. It's useful for ensuring the safety of files before opening them.
Squoosh
Squoosh is an online image optimizer that allows you to compress and compare images using various codecs directly in your browser.
Freebuff
Freebuff is a free CLI coding agent that helps you build full-stack apps without subscriptions or setup. It's an alternative to various coding platforms.
Jitsu
Jitsu is an open-source platform for capturing event data from various sources and streaming it into data warehouses for real-time analytics.
Kaneo
Kaneo is an open source project management tool that can be self-hosted, designed to be simple and powerful for managing projects effectively.
Listmonk
Listmonk is a self-hosted newsletter and mailing list manager that allows you to manage subscriptions and send transactional emails efficiently.
Medusa
Medusa is an open-source commerce platform designed for developers to build and manage online stores with flexibility and customization.
Supabase
Supabase provides a backend as a service with a Postgres database, authentication, and instant APIs, making it easier to build production-grade applications.
spec out top feature request
Goal: find the three most-requested features in this open-source project's GitHub issues, then draft a short spec for the top one. Steps: search the repo's issues, rank by reaction count and comment volume, identify the top three, pick the highest-impact one, and write a one-page spec with scope, edge cases, and a rough implementation plan. Show your work.
build real-time collaboration
Add a real-time collaborative layer to an app: live cursors plus click-to-drop comment pins, like Figma. Use WebSocket (Socket.io or native ws). Requirements: other users' cursors shown live, comments appear for everyone instantly, graceful reconnect with no ghost cursors, debounced cursor updates. Build it end to end, then prove sync works with two simulated clients before calling it done.
build a habit tracker
Build the scaffold for a habit-tracking web app. Stack: React front end, Node/Express API, Postgres, email-and-password auth. Features: user signup, create/edit/delete habits, daily check-ins, a streak counter, and a weekly summary view. Build the database schema first, then the API, then the UI. Wire them together and note anything I'd need to configure to run it.
create a black hole scene
Build a single-file WebGL scene: a black hole with gravitational lensing that visibly bends a starfield behind it, plus an accretion disk with color based on temperature. Add orbit controls. Quality bar: this should look like a science visualization, not a shader tutorial. Build the file.
build physics scenes in html5
Build three HTML5 canvas scenes with computed physics, no libraries, one file each: (1) a bridge collapsing and dropping a vehicle into water with displacement, (2) cloth falling over an invisible object, (3) a stack of blocks toppling from a nudge. Physics computed not animated, 60fps, reset button, and comment the equations. Don't ask questions first.
build a browser game
Build a single-file browser game: a top-down arena where the player dodges and shoots waves of enemies. WebGL or canvas, no external assets. Include: real movement momentum, enemy hit reactions, screen shake on impact, a score counter, and a restart button. 60fps target. Make it feel responsive, not floaty. Build the whole thing.
NoSignups
A directory of open-source tools that can be used instantly in your browser without any sign-up required.
CodeCrafters
Offers advanced programming challenges where you can build systems like Redis and Git from scratch, aimed at experienced developers.
roadmap.sh
This site provides community-driven roadmaps, articles, and guides for developers to help them navigate their career growth effectively.
Vercel
Vercel provides a platform for deploying and hosting web applications with a focus on performance and developer experience.
Dollar Deploy
Dollar Deploy allows you to deploy your app to production without needing DevOps skills. It connects to your GitHub repo and supports various frameworks for quick deployment.
Coolify
Coolify is an open-source platform for self-hosting applications, databases, and services, providing an alternative to Heroku.
here.now
Publish files or folders to the web instantly using an AI agent, with no sign-up required. It provides a live URL back in seconds.
rubber duck, but sharper
walk through this function line by line and tell me the exact moment the state stops matching what I expect. don't summarize -- narrate it like you're stepping through a debugger.
regex101
build and test a regex with a live match breakdown, so you stop guessing what your pattern actually caught.
carbon.now.sh
turns a code snippet into a clean, shareable image -- still the fastest way to post code that looks good.
tinypng
drag in a png or jpg and it comes back 60-80% smaller with barely any visible loss. no login for files under 5mb, has a paid api for bulk jobs.
cron guru
type a cron expression, get a plain-english translation of when it actually runs.