Open Source Projects using CSS
A curated collection of the 580 best open source software using CSS. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
Visual regression testing for seamless UI development
Stars
612Last commit
19 hours agoLicense
MIT
Automate visual testing, catch UI bugs early, and collaborate effortlessly with your team to maintain pixel-perfect interfaces.
Open Source Alternative to:
Federated short videos without corporate control
Stars
442Last commit
2 days agoLicense
AGPL-3.0
Open-source, decentralized short-video platform that gives creators control. No ads, no lock-in, built on ActivityPub for true community ownership.
Open Source Alternative to:
Open-source GraphQL federation platform
Stars
485Last commit
13 hours agoLicense
MIT
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs
Open Source Alternative to:
Inspect, debug, and replay BullMQ queues visually
Stars
434Last commit
3 months agoLicense
MIT
Desktop app and embeddable dashboard for BullMQ that shows live queue metrics, job runs, FlowProducer graphs, and scheduler status without touching Redis directly.
Open Source Alternative to:
Self-hosted media processing with full control
Stars
382Last commit
2 days agoLicense
AGPL-3.0
Open-source alternative to Cloudinary offering self-hosted media transformation. Works with S3/R2/MinIO. Upload, transform, and deliver images/videos without vendor lock-in.
Open Source Alternative to:
Simplify project management for developers
Stars
447Last commit
3 days agoLicense
Apache-2.0
Shelve is a comprehensive project management tool designed to streamline workflows and enhance collaboration for developers and teams.
Open Source Alternative to:
Real-time event tracking and response for tech products
Stars
476Last commit
26 days agoLicense
AGPL-3.0
Track critical events, receive instant notifications, and respond to product activities with customizable webhooks and action buttons
Open Source Alternative to:
Web3 writing platform for content creators and crypto enthusiasts
Stars
490Last commit
2 days agoLicense
MIT
Sigle is a secure, open-source platform for Web3 writers to create, publish, and monetize content on the Bitcoin blockchain.
Open Source Alternative to:
AI governance made simple, secure, and compliant
Stars
338Last commit
11 hours agoLicense
AGPL-3.0
Open-source AI governance platform helping teams meet regulatory standards like EU AI Act and ISO 42001. Monitor model performance, manage risks, and maintain compliance with enterprise-grade security.
Open Source Alternative to:
Simple content management for modern sites
Stars
380Last commit
12 hours agoLicense
AGPL-3.0
A headless CMS designed for blogs, changelogs, and articles. Features intuitive editor, team collaboration, media management, and API integration.
Open Source Alternative to:
Unified API, event, and AI agent management platform
Stars
442Last commit
10 hours agoLicense
Apache-2.0
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise security and 4x faster gateway performance.
Open Source Alternative to:
End-to-end encrypted collaborative document editor
Stars
392Last commit
14 hours agoLicense
AGPL-3.0
Write, organize, and collaborate in real-time with complete privacy and security. This app is an open-source, online/offline compatible, and AI-free alternative to Google Docs.
Open Source Alternative to:
Fast, secure, and privacy-focused web browsing
Stars
374Last commit
1 day agoLicense
MPL-2.0
Midori Browser is a lightweight, fast, and secure browser that protects users' privacy, available for Windows, Linux, and Android.
Open Source Alternative to:
Create stunning forms with AI-powered builder and analytics
Stars
356Last commit
3 months agoLicense
MIT
Build beautiful, interactive forms with AI assistance. Open-source alternative to Google Forms with unlimited submissions, advanced analytics, and seamless integrations.
Open Source Alternative to:
Professional link management for modern teams
Stars
338Last commit
5 months agoLicense
AGPL-3.0
Open-source platform for creating shortened URLs with advanced analytics, custom domains, and API integration for marketing and development teams.
Open Source Alternative to:
Community-driven platform built for transparency
Stars
393Last commit
11 hours agoLicense
AGPL-3.0
Open-source communication platform with multi-window chat, economy systems, and privacy-first approach. Built by communities for superior performance.
Open Source Alternative to:
Experiment tracking platform for ML teams
Stars
392Last commit
6 months agoLicense
Apache-2.0
Open source ML experiment tracking platform with parameter and gradient logging, media tracking, real-time alerts, and full Weights & Biases API compatibility.
Open Source Alternative to:
Track coding time across 70+ editors, completely free
Stars
184Last commit
10 hours agoLicense
MIT
Free, open-source coding time tracker compatible with VS Code, JetBrains IDEs, vim, emacs and more. No limits, no paywalls - your data stays yours forever.
Open Source Alternative to:
Connect APIs, databases, and streams without glue code
Stars
360Last commit
2 months agoLicense
Unknown
Automated data integration platform that connects APIs, databases, and event streams using semantic schemas. Deploy secure integrations in minutes with Git-based workflows.
Open Source Alternative to:
Build lasting communities with modern forum technology
Stars
329Last commit
3 days agoLicense
MPL-2.0
Create permanent, discoverable communities with modern forum features. Combines discussion, curation, and wiki functionality in one platform.
Open Source Alternative to:
Seamless data import for your applications
Stars
290Last commit
2 months agoLicense
MIT
Open-source solution for effortless data importing, mapping, and validation in web applications
Deploy web apps with automated CI/CD and full infrastructure control
Stars
253Last commit
16 hours agoLicense
GPL-3.0
Self-hosted platform for web applications offering automated CI/CD pipelines, multiple environments, and Git integration - with 47% infrastructure cost savings.
Open Source Alternative to:
Organize, discover, and personalize your bookmarks
Stars
326Last commit
3 months agoLicense
AGPL-3.0
Open-source bookmark manager with timeline view, one-click saving, categorization, and sharing features. Free plan available with pro upgrades.
Open Source Alternative to:
Effortless changelog creation for open-source projects
Stars
284Last commit
20 hours agoLicense
AGPL-3.0
Automate and simplify changelog generation from Git commits, ensuring clear and consistent project documentation.
Open Source Alternative to:
Distraction-free note-taking with powerful features
Stars
308Last commit
13 hours agoLicense
AGPL-3.0
A customizable, offline-first note editor that lets you format text, create lists, add images, and export to HTML - all while maintaining your privacy.
Open Source Alternative to:
OTA updates for Capacitor apps without app store delays
Stars
205Last commit
10 hours agoLicense
AGPL-3.0
Live update platform for Ionic and Capacitor apps that pushes JavaScript, CSS, and asset changes to devices in minutes, with channels, rollback, and release analytics.
Open Source Alternative to:
Decentralized CAPTCHA for enhanced web security
Stars
298Last commit
10 hours agoLicense
Apache-2.0
A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.
Open Source Alternative to:
Your unified cloud storage solution
Stars
370Last commit
10 months agoLicense
AGPL-3.0
Firefiles is an open-source alternative to Dropbox that lets you manage files across multiple cloud storage providers through a single interface.
Open Source Alternative to:
Open-source changelog & roadmap platform for teams
Stars
296Last commit
6 months agoLicense
Apache-2.0
Self-hostable changelog and roadmap platform with community voting, automated newsletters, and kanban boards. Deploy with Docker in minutes.
Open Source Alternative to:
Self-hosted AI coding agent that opens real PRs
Stars
196Last commit
10 hours agoLicense
FCL-1.0
Source-available, self-hosted AI coding agent that connects to your repo, tools, and chat to investigate issues and open reviewable PRs on your own infrastructure.
Open Source Alternative to:
Transform idle cash into competitive yield for startups
Stars
249Last commit
5 months agoLicense
MIT
High-yield treasury management for startups earning 8% APY with insurance coverage up to $1M. Open US/EU accounts instantly with full liquidity and no minimums.
Effortless blogging for developers and tech enthusiasts
Stars
253Last commit
5 months agoLicense
AGPL-3.0
A minimalist, markdown-based blogging platform designed for developers, featuring syntax highlighting and seamless Git integration.
Open Source Alternative to:
Personal blogging platform that meets you where you write
Stars
188Last commit
14 hours agoLicense
MIT
Publish blog posts by email, from Obsidian, iA Writer, the web editor, CLI, or API. Includes RSS, email subscribers, analytics, custom domains, and full export.
Open Source Alternative to:
Scale document creation with automated workflows
Stars
163Last commit
2 months agoLicense
AGPL-3.0
Complete document lifecycle management with automated generation, approval workflows, e-signatures, and branded templates. Create professional documents at scale.
Open Source Alternative to:
GDPR-compliant bot protection without user friction
Stars
187Last commit
15 hours agoLicense
Unknown
Privacy-first CAPTCHA service that blocks bots while keeping forms accessible. No puzzles, no tracking, no cookies - just invisible cryptographic protection.
Open Source Alternative to:
Generate legal policies directly from TypeScript code
Stars
160Last commit
17 days agoLicense
Apache-2.0
Open-source policy-as-code framework that lets developers create privacy policies, terms of service, and legal agreements using TypeScript with built-in GDPR/CCPA compliance.
Open Source Alternative to:
Effortlessly manage tasks, projects, and teams
Stars
246Last commit
1 year agoLicense
AGPL-3.0
A versatile project management platform that combines task organization, team collaboration, and workflow automation in one intuitive interface.
Open Source Alternative to:
Privacy-first, cookieless analytics without consent banners
Stars
173Last commit
10 hours agoLicense
AGPL-3.0
GDPR-compliant web analytics with real-time insights, session replay, and funnel tracking. No cookies, no tracking, no consent banners required.
Open Source Alternative to:
Fast, secure, and free personal note-taking app
Stars
178Last commit
15 days agoLicense
Unknown
OpenNotas is a multi-platform, end-to-end encrypted note-taking app that offers simplicity, synchronization, and offline functionality.
Open Source Alternative to:
Secure open source messaging for professional teams
Stars
163Last commit
13 hours agoLicense
AGPL-3.0
Free Matrix-based messenger with end-to-end encryption, multi-platform bridges, and on-premise deployment. Connect across 30+ networks securely.
Open Source Alternative to:
Create and manage forms with ease
Stars
183Last commit
1 year agoLicense
Apache-2.0
Formizee is an open-source platform for designing, building, and analyzing forms, offering an affordable all-in-one solution
Open Source Alternative to:
Launch your personal website in minutes, no coding required
Stars
227Last commit
4 months agoLicense
AGPL-3.0
Free site builder to create a personal website with articles, projects, email capture, and analytics. Open source, fast, and beautifully designed.
Open Source Alternative to:
CodeRabbit – The leading AI Code Review platform. Ship better quality code in 50% less time, with 90% fewer bugs.
Stellar Hosted
Sevalla
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