FREE TOOLS FOR DEVELOPERS
A curated, community-fed directory of free and open-source developer tools. No paywalls.
Tools
Aceternity UI
Trending UI component library featuring cutting-edge animations, 3D card effects, glowing grids, lamp headers, and copy-paste React components built with Tailwind CSS and Framer Motion.
Anim Master Lib
A comprehensive collection of copy-paste CSS and Framer Motion animation recipes, entrance effects, hover states, loaders, and interactive components for modern web developers.
Design Prompts
A curated directory of battle-tested AI prompts, design system directives, and UI generation frameworks crafted for Midjourney, ChatGPT, Claude, and generative design tools.
Haikei
A generative design tool to discover, customize, and export stunning SVG shapes, layered waves, polygon blobs, gradients, and low-poly geometric backgrounds.
Motion Primitives
An open-source library of beautifully crafted animated components and UI primitives built with Motion and Tailwind CSS to bring web applications to life with fluid micro-interactions.
OriginKit
Open-source UI component library built with Tailwind CSS and Motion, offering customizable, accessible, copy-paste components and animated building blocks for web developers.
Watermelon UI
A curated collection of sleek, interactive React components crafted with Tailwind CSS and Framer Motion for building modern web applications with copy-paste simplicity.
Cleric
AI Site Reliability Engineer investigating production alerts, performing root cause analysis, and building a knowledge graph from resolutions to speed future incidents.
Clay
Go-to-market data platform combining 150+ data providers, AI research agents called Claygents, intent signals, and native email sequencer in spreadsheet workflows.
ChatPDF
AI assistant for reading and querying PDFs, Word docs, PowerPoint files, YouTube videos, and websites with answers anchored to clickable source citations.
CrewAI
Multi-agent orchestration platform with open-source Python framework and enterprise AMP control plane for building, observing, and scaling crews of AI agents.
Common Room
GTM platform unifying first-party data, enrichment, buyer signals, and RoomieAI agents into a Person360 view for RevOps and sales teams.
Figma
Collaborative interface design platform including Figma Design, Dev Mode, FigJam, Figma Slides, and AI generation tools under one collaborative workspace.
Duolingo
Gamified language-learning app with 40+ languages, daily streaks, leagues, stories, and AI tutor on the Max tier powered by GPT-4.
Devin by Cognition
Cognition autonomous AI software engineer running in parallel cloud sandboxes to plan, code, test, and ship pull requests from GitHub, Slack, Linear, and Jira.
Decagon
Enterprise AI agent platform for customer support across voice, chat, and email with shared cross-channel memory used by consumer brands in retail and tech.
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About DEVSTACK
DEVSTACK was built with a single goal in mind: to provide software developers, engineers, and makers with a clean, uncompromised directory of high-utility free and open-source developer tools.
We strip away marketing fluff, paid placement clutter, and artificial paywalls so you can discover the exact tools you need to build faster, debug better, and ship quality software.
Our Core Principles
- 100% Free Tiers: Every tool listed has a genuinely useful free or open-source tier.
- Community Curated: Suggested and validated by active developers.
- No Filler Text: Direct descriptions, clear taglines, and direct visit links.