Open Source Projects using CSS
A curated collection of the 629 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.
Open-source AI browser for intelligent web automation
Stars
516Last commit
7 months agoLicense
BSD-3-Clause
Privacy-focused AI browser with intelligent agents for research, analysis, and workflow automation. Features unified memory, compliance guardrails, and seamless integrations.
Open Source Alternative to:
Open-source GraphQL federation platform
Stars
483Last commit
1 hour agoLicense
MIT
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs
Open Source Alternative to:
Open-source CMS for text-driven websites
Stars
619Last commit
1 month agoLicense
MIT
Create manuals, documentation, and websites with this markdown-based content management system, with options for ebook conversion.
Open Source Alternative to:
Self-hostable image and video delivery with URL transforms
Stars
413Last commit
16 days agoLicense
AGPL-3.0
Upload, transform, and deliver images and videos via a REST API and URL parameters, using your own S3-compatible storage. Cloudinary-compatible syntax, no vendor lock-in.
Open Source Alternative to:
AI governance made simple, secure, and compliant
Stars
Stars growing over the last 30 days365Last commit
32 minutes 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:
Inspect, debug, and replay BullMQ queues visually
Stars
452Last commit
5 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:
Simplify project management for developers
Stars
458Last commit
9 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:
Self-hosted project management with boards and test tracking
Stars
Stars growing quickly over the last 30 days357Last commit
8 hours agoLicense
AGPL-3.0
Self-hosted, open-source project management tool with boards, milestones, portals, time tracking, and test management on your own infrastructure.
Open Source Alternative to:
End-to-end encrypted collaborative document editor
Stars
Stars growing over the last 30 days448Last commit
3 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:
Web3 writing platform for content creators and crypto enthusiasts
Stars
489Last commit
6 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:
Simple content management for modern sites
Stars
384Last commit
4 days 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:
Real-time event tracking and response for tech products
Stars
474Last commit
19 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:
Unified API, event, and AI agent management platform
Stars
461Last commit
14 minutes 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:
Self-hosted AI coding agent that opens real PRs
Stars
Stars growing quickly over the last 30 days298Last commit
34 minutes 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:
Fast, secure, and privacy-focused web browsing
Stars
408Last commit
7 hours 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:
Track coding time across 70+ editors, completely free
Stars
Stars growing over the last 30 days215Last commit
28 minutes 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:
Track your brand's visibility across AI answer engines
Stars
Stars growing quickly over the last 30 days270Last commit
5 days agoLicense
AGPL-3.0
GEO tool that queries ChatGPT, Claude, Gemini, and Perplexity with your buyers' questions, then shows you who gets recommended and how to close the gap.
Open Source Alternative to:
Professional link management for modern teams
Stars
343Last commit
29 days 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:
Low-code and no-code platform for business apps
Stars
386Last commit
7 hours agoLicense
AGPL-3.0
Full-stack open source platform combining no-code and low-code studios to build, deploy, and integrate web, mobile, and desktop business applications.
Open Source Alternative to:
Create stunning forms with AI-powered builder and analytics
Stars
355Last commit
5 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:
Community-driven platform built for transparency
Stars
400Last commit
21 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
393Last commit
8 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:
Deploy web apps with automated CI/CD and full infrastructure control
Stars
265Last commit
5 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:
Build lasting communities with modern forum technology
Stars
340Last commit
11 hours 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
294Last commit
2 months agoLicense
MIT
Open-source solution for effortless data importing, mapping, and validation in web applications
Distraction-free note-taking with powerful features
Stars
317Last commit
5 days 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:
Connect APIs, databases, and streams without glue code
Stars
360Last commit
4 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:
OTA updates for Capacitor apps without app store delays
Stars
211Last commit
32 minutes 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
304Last commit
11 minutes 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:
Bring your own cloud storage, managed in one place
Stars
370Last commit
1 year agoLicense
AGPL-3.0
Firefiles turns S3 buckets and other cloud backends into a unified file manager with browser-based previews, multi-drive support, and a clean light/dark interface.
Open Source Alternative to:
Organize, discover, and personalize your bookmarks
Stars
325Last commit
5 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:
Track and improve your brand's visibility in AI search
Stars
Stars growing quickly over the last 30 days148Last commit
2 hours agoLicense
MIT
Monitors how your brand appears across ChatGPT, Perplexity, Google AI Overviews, and other AI platforms, then turns those insights into prioritized content and optimization actions.
Open Source Alternative to:
Effortless changelog creation for open-source projects
Stars
284Last commit
2 months agoLicense
AGPL-3.0
Automate and simplify changelog generation from Git commits, ensuring clear and consistent project documentation.
Open Source Alternative to:
Open-source changelog & roadmap platform for teams
Stars
301Last commit
8 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:
Transform idle cash into competitive yield for startups
Stars
254Last commit
7 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.
Track and improve your brand's visibility in AI answers
Stars
Stars growing quickly over the last 30 days188Last commit
1 hour agoLicense
MIT
Tracks how often AI tools like ChatGPT, Claude, and Perplexity mention or cite your brand, then fixes the gaps through AEO strategy and content work.
Open Source Alternative to:
Effortless blogging for developers and tech enthusiasts
Stars
254Last commit
2 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
194Last commit
13 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:
GDPR-compliant bot protection without user friction
Stars
198Last commit
3 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
165Last commit
1 day 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:
Privacy-first, cookieless analytics without consent banners
Stars
179Last commit
2 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:
Scale document creation with automated workflows
Stars
168Last commit
18 days 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:
Docmost – Open-source wiki software with real-time collaboration, diagrams, AI, SSO, RBAC permissions and more.
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