Developer Tools

HE

Helicone

4.5/5.01 verified review

Freemium·Open Source·Apache-2.0

Open-source LLM observability platform and gateway for production AI applications.

• Granular token cost and latency monitoring per model
• Response caching to minimize redundant API calls
• Lightweight SDK integration for backend services

6.3kstars on GitHub

GH

Ghost

4.5/5.01 verified review

Freemium·Open Source·MIT

Professional open-source publishing platform with built-in newsletters and monetization.

• Open-source and self-hostable with no licensing restrictions for self-management.
• Integrated business model with native payment gateways and newsletters.
• Minimalist content editor optimized for speed and readability.

55.7kstars on GitHub

CO

Coolify

4.5/5.01 verified review

Free·Open Source·Apache-2.0

Open-source self-hosting platform as an alternative to Heroku and Vercel.

• Self-hosted version is completely free without artificial feature restrictions
• Supports deployments to any SSH-accessible server without vendor lock-in
• Native integration with over 360 one-click services and databases

65.2kstars on GitHub

VE

Vercel

4.5/5.01 verified review

Freemium·Open Source·MIT

Cloud platform for deploying web applications and AI workloads.

• Native Git integration for automated continuous deployment.
• Global edge network and serverless function execution.
• Advanced support for modern frontend frameworks and AI workloads.

143.3kstars on GitHub

DO

Docker

4.5/5.01 verified review

Freemium·Open Source·Apache-2.0

Secure container runtime and microVM isolation platform for modern software development and AI agents.

• Advanced microVM isolation for secure container and agent execution.
• Vast ecosystem of signed, production-ready base images.
• Unified and industry-standard command-line interface for local and cloud workflows.

6.1kstars on GitHub

CA

Cal.com

4.5/5.01 verified review

Freemium·Open Source·MIT

Open scheduling infrastructure and scheduling API for individuals and teams.

• Highly customizable scheduling infrastructure
• Extensive app marketplace and integrations
• Comprehensive developer API and React components

49.4kstars on GitHub

DA

DataHub

4.5/5.01 verified review

Freemium·Open Source·Apache-2.0

Data context and governance platform for engineering and artificial intelligence teams

• Unified context graph connecting lineage, quality, and real-time metadata
• Strong open-source community adoption with thousands of active organizations
• Extensible architecture designed to integrate with AI agent workflows

12.9kstars on GitHub

ST

Stytch

4.5/5.01 verified review

Freemium·Open Source·MIT

API-first authentication and security platform for modern applications.

• Comprehensive APIs and SDKs for passwordless auth and passkeys
• Embeddable admin portal for enterprise customer self-service
• Native support for SAML SSO and SCIM provisioning

40stars on GitHub

PL

Plannotator

4.5/5.01 verified review

Free·Open Source·Apache-2.0

Local inbox and visual review layer for AI agent coding workflows.

• Open-source tool executed locally on developer machines.
• Compatible with multiple coding agents through CLI and MCP protocols.
• Native web interface for reviewing plans, code diffs, and visual annotations.

9.9kstars on GitHub

TR

TRACE

4.5/5.01 verified review

Freemium·Open Source·MIT

Weekly open evaluation of web scraping APIs for artificial intelligence agents.

• Fresh weekly sample testing over thousands of real web pages.
• Automated and blind evaluation methodology across providers.
• Granular and public metrics covering latency and success rates.

2stars on GitHub

DO

Dokku

4.5/5.01 verified review

Free·Open Source·MIT

An open source, lightweight PaaS alternative for deploying and managing applications.

• Open source software with no vendor lock-in or licensing fees.
• Simple and straightforward deployments via traditional git push commands.
• Very low resource footprint compared to heavy orchestration platforms.

32.2kstars on GitHub

DA

Daily

4.5/5.01 verified review

Paid·Open Source·BSD-2-Clause

Global WebRTC infrastructure for real-time voice, video, and conversational AI agents.

• Ultra-low latency via optimized global WebRTC infrastructure.
• Pipecat framework specialized for conversational AI agent orchestration.
• Technical documentation written by authors of WebRTC standards.

627stars on GitHub