Public library

The Wikipedia of how modern software is built.

Curated observations, careful inferences, and practical recommendations. Patterns to learn from, not products to clone.

open-source

Deno

Open-source JavaScript and TypeScript runtime with built-in security and tooling.

#runtime#javascript#typescript

open-source

Svelte

Open-source UI framework that compiles components to efficient vanilla JavaScript at build time.

#javascript#framework#frontend

open-source

shadcn/ui

Open-source collection of copy-paste React components built on Radix UI and Tailwind CSS.

#react#ui#components

open-source

PostgreSQL

Open-source object-relational database system known for reliability and standards compliance.

#database#sql#relational

open-source

Tailwind CSS

Open-source utility-first CSS framework for rapidly building custom user interfaces.

#css#styling#frontend

open-source

Next.js

Open-source React framework for full-stack web applications with server-side rendering and static generation.

#react#framework#fullstack

open-source

React

Open-source JavaScript library for building user interfaces with a component-based model.

#javascript#ui#library

consumer

Superhuman

Fast keyboard-driven email client designed for speed and inbox productivity.

#productivity#email#saas

consumer

Arc

Reimagined web browser with spaces, sidebar tabs, and a focus on organization.

#browser#productivity#software

consumer

Duolingo

Gamified language-learning app offering bite-sized lessons across dozens of languages.

#education#language#learning

consumer

Airbnb

Online marketplace for booking short-term lodging, homestays, and travel experiences.

#travel#marketplace#booking

consumer

Spotify

Audio streaming platform offering music, podcasts, and audiobooks across mobile, desktop, and web.

#music#streaming#media

communication

Cal.com

Open-source scheduling platform for booking meetings and managing availability.

#scheduling#calendar#open-source

communication

Resend

Developer-focused email API for sending transactional and marketing email.

#email#api#transactional

communication

Loom

Async video messaging tool for recording and sharing screen and camera.

#video#async#screen-recording

communication

Intercom

AI-first customer service platform combining chat, help desk, and bots.

#support#chat#customer-service

communication

Twilio

Communications APIs for SMS, voice, email, and messaging in applications.

#api#sms#voice

communication

Discord

Voice, video, and text chat platform built around communities and servers.

#chat#community#voice

communication

Zoom

Video conferencing and online meeting platform for teams and events.

#video#meetings#conferencing

communication

Slack

Team messaging platform organizing conversations into channels and threads.

#chat#team#collaboration

fintech

Revolut

Financial super-app offering banking, currency exchange, stock and crypto trading.

#neobank#banking#money-transfer

fintech

Brex

Corporate card and financial stack offering spend management, banking, and travel for companies.

#corporate-cards#spend-management#business-banking

fintech

Wise

International money transfer service offering multi-currency accounts at the mid-market exchange rate.

#money-transfer#multi-currency#payments

fintech

Ramp

Corporate card and spend management platform that automates expenses and bill payments.

#spend-management#corporate-cards#expenses

fintech

Mercury

Online banking platform built for startups, offering business checking, savings, and credit cards.

#banking#startups#business-banking

fintech

Coinbase

Cryptocurrency exchange for buying, selling, and storing digital assets.

#crypto#exchange#trading

fintech

Plaid

API platform that connects apps to users' bank accounts for payments and financial data.

#banking-api#data#developer-infrastructure

fintech

Stripe

Payment processing and financial infrastructure platform for online businesses and developers.

#payments#api#developer-infrastructure

design

Rive

Real-time interactive animation tool for creating and shipping vector animations across platforms.

#animation#design-tool#interactive

design

Spline

Browser-based tool for designing and collaborating on interactive 3D scenes for the web.

#3d-design#design-tool#web-design

design

Framer

Visual website builder and design tool that combines design and publishing into a single no-code workflow.

#website-builder#design-tool#no-code

design

Webflow

Visual development platform for building responsive, production-ready websites without writing code.

#website-builder#no-code#cms

design

Figma

Collaborative, browser-based interface design tool for prototyping, design systems, and real-time team collaboration.

#design-tool#prototyping#collaboration

analytics

Segment

Customer data platform that collects and routes event data to downstream tools.

#cdp#data-pipeline#integrations

analytics

dbt

Transformation framework for building and testing data models in the warehouse.

#data-transformation#analytics-engineering#sql

analytics

Mixpanel

Event-based product analytics platform for tracking user actions and retention.

#product-analytics#events#funnels

analytics

Grafana

Open-source observability platform for dashboards, metrics, logs, and alerts.

#observability#dashboards#open-source

analytics

Amplitude

Digital analytics platform for product teams to analyze user behavior and funnels.

#product-analytics#experimentation#enterprise

analytics

Snowflake

Cloud data platform for warehousing, analytics, and data sharing at scale.

#data-warehouse#cloud#sql

analytics

Datadog

Cloud monitoring and observability platform for metrics, traces, and logs.

#observability#monitoring#apm

analytics

PostHog

Open-source product analytics platform with session replay, feature flags, and experiments.

#product-analytics#open-source#session-replay

productivity

Obsidian

A local-first note-taking app that links Markdown notes into a personal knowledge graph.

#notes#markdown#knowledge-management

productivity

Miro

An online collaborative whiteboard platform for brainstorming, diagramming, and visual planning.

#whiteboard#collaboration#diagramming

productivity

Airtable

A spreadsheet-database hybrid for building flexible apps to organize and manage data.

#database#spreadsheet#no-code

productivity

Todoist

A cross-platform task manager for capturing, organizing, and tracking to-dos and projects.

#tasks#to-do#personal-productivity

productivity

Asana

A work management platform for organizing tasks, projects, and team workflows at scale.

#project-management#tasks#workflows

productivity

Linear

A streamlined issue tracking and project management tool built for software product teams.

#project-management#issue-tracking#engineering

productivity

Notion

An all-in-one workspace combining notes, docs, wikis, databases, and project management with built-in AI.

#notes#docs#wiki

infrastructure

Clerk

Authentication and user management platform with prebuilt UI components for web and mobile applications.

#auth#identity#frontend

infrastructure

Firebase

Google's app development platform with realtime databases, authentication, hosting, and serverless functions.

#backend#database#auth

infrastructure

Supabase

Open-source backend platform offering a Postgres database, authentication, storage, and realtime APIs.

#database#backend#auth

infrastructure

Amazon Web Services

Comprehensive cloud platform offering compute, storage, databases, networking, and hundreds of managed services.

#cloud#iaas#hosting

infrastructure

Cloudflare

Global network providing CDN, DNS, edge compute, security, and DDoS protection for websites and applications.

#edge#cdn#security

infrastructure

Vercel

Frontend cloud platform for deploying and hosting web applications, with native support for Next.js and serverless functions.

#hosting#frontend#serverless

developer-tools

ngrok

Tool that exposes local servers to the public internet through secure tunnels.

#networking#tunnels#webhooks

developer-tools

Playwright

Microsoft's framework for reliable end-to-end testing and browser automation.

#testing#automation#e2e

developer-tools

GitHub Actions

GitHub's built-in CI/CD platform for automating build, test, and deployment workflows.

#ci-cd#automation#github

developer-tools

JetBrains

Maker of IntelliJ IDEA and a family of language-specific IDEs for professional developers.

#ide#editor#tools

developer-tools

GitHub Copilot

GitHub's AI pair programmer that suggests code and answers questions inside the editor.

#ai#coding#autocomplete

developer-tools

Visual Studio Code

Microsoft's free, extensible source-code editor for many languages and platforms.

#editor#ide#microsoft

ElevenLabs

AI platform for realistic text-to-speech, voice cloning, and audio generation.

#ai-app#voice#audio

Cursor

AI-native code editor that integrates LLMs for code completion and chat.

#ai-coding#dev-tools#editor

Midjourney

Generative AI service that creates images from natural-language text prompts.

#ai-app#image-generation#creative

Hugging Face

Open platform for hosting, sharing, and running machine learning models and datasets.

#ai-platform#models#open-source

Perplexity

AI-powered answer engine that responds to questions with cited web sources.

#ai-app#search#answer-engine

Anthropic

AI safety company that builds the Claude family of large language models.

#model-provider#ai-lab#claude

ChatGPT

OpenAI's conversational AI assistant for text, image, and voice interactions.

#ai-app#chatbot#assistant

OpenAI

AI research lab and product company behind ChatGPT and the GPT family of models.

#model-provider#ai-lab#chatgpt