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Open Source Projects using CircleCI

A curated collection of the 21 best open source software using CircleCI. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.

LiteLLM

AI
LLM gateway for auth, load balancing, and spend tracking

  • Stars

    Stars growing over the last 30 days62,739

  • Last commit

    5 hours ago

  • License

    Unknown
Acts as a unified proxy across 100+ LLMs, normalizing them to the OpenAI format while handling virtual keys, budgets, rate limits, fallbacks, and cost tracking.

Open Source Alternative to:

OpenRouter

GPT4All

AI
Run open-source AI models privately on your own device

  • Stars

    77,341

  • Last commit

    1 year ago

  • License

    MIT
GPT4All runs open-source language models locally on Windows, macOS, and Linux with no cloud dependency, keeping your data on your machine.

Open Source Alternative to:

LM Studio

Penpot

Open-source UI design and prototyping for product teams

  • Stars

    62,086

  • Last commit

    6 hours ago

  • License

    MPL-2.0
Design, prototype, and hand off to developers in one platform. Supports design systems, tokens, flexible layouts, and AI workflows with real CSS/HTML output.

Open Source Alternative to:

Canva

Chatwoot

Omnichannel customer support with a built-in AI assistant

  • Stars

    Stars growing over the last 30 days38,907

  • Last commit

    7 hours ago

  • License

    MIT
Manage customer conversations across live chat, email, WhatsApp, Instagram, and more from one inbox, with an AI assistant that suggests replies and automates common questions.

Open Source Alternative to:

Open

Dragonfly

Blazing-fast in-memory data store for modern applications

  • Stars

    31,844

  • Last commit

    6 hours ago

  • License

    Unknown
Dragonfly is a high-performance, Redis-compatible in-memory data store that delivers up to 25x more throughput and 80% lower costs than legacy solutions.

Open Source Alternative to:

Redis

InfluxDB

Purpose-built time series database for real-time systems

  • Stars

    31,799

  • Last commit

    10 hours ago

  • License

    Apache-2.0
InfluxDB handles high-velocity, high-resolution time series data at scale, built for telemetry, edge devices, IoT, and physical AI workloads.

Open Source Alternative to:

Amazon Timestream

Dokku

Self-hosted mini-PaaS for deploying applications easily

  • Stars

    32,220

  • Last commit

    7 hours ago

  • License

    MIT
A Docker-powered platform that lets you deploy Heroku-compatible applications via Git, with buildpack support and container isolation.

Open Source Alternative to:

Vercel

GDevelop

Create 2D and 3D games without coding, powered by AI assistance

  • Stars

    Stars growing over the last 30 days28,451

  • Last commit

    21 hours ago

  • License

    Unknown
Free, open-source game engine with visual event system, AI tutor, and one-click publishing to Steam, iOS, Android, and web platforms.

Open Source Alternative to:

Unreal Engine

SuperTokens

Secure, customizable authentication for your applications

  • Stars

    15,344

  • Last commit

    20 hours ago

  • License

    Unknown
Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.

Open Source Alternative to:

Auth0

LanguageTool

AI-powered grammar checker for 30+ languages

  • Stars

    15,235

  • Last commit

    9 hours ago

  • License

    LGPL-2.1
Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.

Open Source Alternative to:

Grammarly

Blinko

AI-Powered Note Taking App

  • Stars

    11,163

  • Last commit

    7 hours ago

  • License

    GPL-3.0
The next generation of open-source AI-powered card notes designed to help you quickly capture and organize inspiration so that ideas never run out.

Open Source Alternative to:

Notion

Kap

Effortless screen recording for macOS

  • Stars

    19,417

  • Last commit

    2 years ago

  • License

    MIT
Capture, edit, and share your screen with ease. Create stunning GIFs and videos for tutorials, demos, and bug reports.

Open Source Alternative to:

Loom

Ever Gauzy

Comprehensive open-source business management platform

  • Stars

    Stars growing over the last 30 days8,695

  • Last commit

    1 day ago

  • License

    AGPL-3.0
All-in-one solution for ERP, CRM, HRM, ATS, and project management to streamline your business operations

Open Source Alternative to:

Salesforce

Cosmos Server

Self-hosted cloud platform with automated security

  • Stars

    6,196

  • Last commit

    15 days ago

  • License

    Unknown
Complete self-hosting solution with automated maintenance, Smart-Shield protection, anti-DDoS, SSO authentication, and VPN access for secure private cloud management.

Open Source Alternative to:

Umbrel

Opengrep

Open-source code security engine for developers

  • Stars

    Stars growing over the last 30 days3,285

  • Last commit

    20 hours ago

  • License

    LGPL-2.1
Opengrep is a community-driven fork of SemgrepCE, providing accessible static code analysis and security scanning for developers.

Chartbrew

Create stunning data visualizations with ease

  • Stars

    4,065

  • Last commit

    9 hours ago

  • License

    MIT
A powerful, open-source platform for building interactive dashboards and charts from multiple data sources without coding.

Open Source Alternative to:

Power BI

Icinga

Open source monitoring for complex IT infrastructure

  • Stars

    2,245

  • Last commit

    21 hours ago

  • License

    GPL-3.0
Monitor networks, servers, and cloud environments with flexible open-source solution. Custom checks, fast alerts, and complete infrastructure control.

Open Source Alternative to:

DataDog

Ever Teams

Real-time work and project management platform

  • Stars

    601

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Ever Teams offers an all-in-one solution for work management, time tracking, and team collaboration with integrations for popular tools.

Open Source Alternative to:

Jira

Gravitee

Unified API, event, and AI agent management platform

  • Stars

    467

  • Last commit

    6 hours ago

  • License

    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:

Postman

Midori Browser

Fast, secure, and privacy-focused web browsing

  • Stars

    413

  • Last commit

    11 hours ago

  • License

    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:

Firefox

Convertigo

Low-code and no-code platform for business apps

  • Stars

    387

  • Last commit

    14 hours ago

  • License

    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:

Power Apps
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