Open-source projects built with PostCSS

n8n

A source-available workflow automation tool with a visual editor, code steps and a large integration library.

Open WebUI

A self-hosted AI chat interface for local and cloud models, with multi-user access control.

Supabase

A Postgres-based backend platform that bundles a database, auth, auto-generated APIs, storage, realtime and edge functions, available hosted or self-hosted.

Apache Superset

An open-source data exploration and visualization platform for building charts and dashboards over SQL databases, run by the Apache Software Foundation.

AnythingLLM

An app for chatting with your documents using any LLM and vector database, available as a desktop app or a multi-user Docker server.

Prometheus

A metrics monitoring and alerting system that stores time series locally and is queried with PromQL; a CNCF graduated project.

Coolify

A platform for deploying applications, databases and services on your own servers over SSH.

Penpot

A browser-based design and prototyping tool where designers and developers work on the same files, with SVG as its native format.

Plane

An open-source project and issue tracker with cycles and modules, built as a Jira alternative.

Gitea

A lightweight self-hosted Git service with issues, pull requests, a package registry and built-in CI (Gitea Actions).

Ghost

A publishing platform for blogs, newsletters and paid memberships, which you can self-host or use as the managed Ghost(Pro) service.

Metabase

A business intelligence tool where people ask questions of their databases through a query builder or SQL and build dashboards.

Cal.diy

The open-source community edition of Cal.com: a scheduling and booking-page tool you can self-host. It is MIT licensed; Cal.com itself has been closed source since April 2026.

Rocket.Chat

A self-hostable team communications platform with chat, channels, and omnichannel customer messaging.

LibreChat

A self-hosted chat interface that works with many AI model providers, with SSO and agents.

Logseq

A privacy-first, open-source knowledge base and outliner that stores notes locally and links them with [[backlinks]].

Payload

A TypeScript CMS and application framework that runs inside Next.js and generates an admin panel and APIs from one config.

PhotoPrism

A self-hosted photo library that uses AI-based tagging and face and place recognition to browse and search your pictures and videos.

PostHog

A product analytics platform that also includes session replay, feature flags, experiments and surveys, offered as PostHog Cloud or a self-hosted deployment.

Umami

A self-hosted, privacy-focused web analytics tool that works without cookies.

Portainer

A web UI for managing containers on Docker, Swarm, Podman, Kubernetes and ACI, offered as a free Community Edition and a paid Business Edition.

Chatwoot

A customer support inbox that brings live chat, email and social channels into one shared view for support teams.

Medusa

A Node.js commerce platform with a built-in framework for building custom online stores, marketplaces and B2B commerce apps.

Langfuse

An open-source platform for tracing, evaluating and managing prompts for LLM applications.

Jenkins

A Java-based, self-hosted automation server with a large plugin ecosystem, mostly used to build, test and deploy software.

Zulip

A self-hostable team chat app that organizes every conversation into topics inside channels.

Activepieces

A workflow automation tool with a no-code builder and a TypeScript integration framework, available self-hosted or as a cloud service.

A self-hosted personal finance manager for tracking income and expenses, with budgets, categories, rules and a REST API.

Docmost

An open-source collaborative wiki and documentation tool with real-time editing, spaces, groups and page history.

Formbricks

An open-source survey and feedback tool for in-product and link surveys that you can self-host.

Frappe HR

An open-source HR and payroll system covering employee records, leave, attendance, expenses, appraisals and payroll, built on the Frappe Framework.

Vikunja

A self-hosted to-do and task manager with lists, Kanban, Gantt and table views, shared projects and a full API.

OpnForm

An open-source form builder with a no-code editor, embeds, integrations and a hosted cloud or a Docker self-hosted option.

LimeSurvey

A PHP survey platform with conditional logic, multilingual surveys and a remote-control API, available self-hosted or as a paid cloud service.

Keila

An open-source newsletter tool for sending campaigns and building sign-up forms, which you can self-host or use as a paid cloud service.