CCOMBO OS
Tabworthy & Free-for-Dev Engine

Curated Free Developer Stack & Hidden Gems

Hand-picked tools with perpetual free tiers for hosting, storage, AI, and developer leverage. Every quota verified—zero credit card surprises.

Showing 48 of 48 curated services
Frontend

Cloudflare Pages

10/10

Fast, secure edge frontend hosting with unlimited bandwidth, custom domains, and preview deploys.

FREE TIER QUOTA
Unlimited requests & bandwidth, 500 builds/month, 100 custom domains
✓ Commercial OK•No CC
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Compute

Cloudflare Workers

10/10

Ultra-low latency V8 isolate edge serverless compute running across 300+ global locations.

FREE TIER QUOTA
100,000 requests/day, 10ms CPU time/req, zero cold starts
✓ Commercial OK•No CC
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Database

Cloudflare D1

10/10

Serverless SQLite database distributed at the edge with automatic replication and read caching.

FREE TIER QUOTA
5,000,000 rows read/day, 100,000 rows written/day, 5 GB storage
✓ Commercial OK•No CC
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Storage

Cloudflare R2

10/10

S3-compatible distributed object storage with zero egress fees.

FREE TIER QUOTA
10 GB storage, 1,000,000 Class A operations/mo, 10,000,000 Class B operations/mo, ZERO egress fee
✓ Commercial OK•No CC
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Dev Tools

Cloudflare DNS & WAF

10/10

Industry-standard 1.1.1.1 authoritative DNS, DDoS mitigation, and free SSL certificates.

FREE TIER QUOTA
Unlimited DNS queries, DDoS protection, universal SSL certificates
✓ Commercial OK•No CC
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AI & ML

Cloudflare Workers AI

10/10

Run serverless open-source models directly on Cloudflare GPUs at the edge (DeepSeek R1, Llama 3.3, Qwen, Mistral).

FREE TIER QUOTA
10,000 Neurons/day (approx 200-500 free queries daily)
✓ Commercial OK•No CC
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AI & ML

Groq Cloud

10/10

LPU inference engine delivering 500+ tokens/second on Llama 3.3 70B and Mixtral.

FREE TIER QUOTA
30 requests/min, 14,400 requests/day, 6,000 tokens/min free tier
✓ Commercial OK•No CC
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AI & ML

Google Gemini 2.5 Flash

9/10

Multimodal foundation model with 1M context window and high reasoning capability.

FREE TIER QUOTA
15 RPM, 1,500 requests/day, 1M TPM on Flash tier
✓ Commercial OK•No CC
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Dev Tools

GitHub Free

10/10

Unlimited public/private Git repositories, GitHub Actions CI/CD, and package registry.

FREE TIER QUOTA
Unlimited repos, 2,000 GitHub Actions build minutes/month, 500MB Packages
✓ Commercial OK•No CC
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Database

Supabase

9/10

The Open Source Firebase alternative: Postgres, pgvector, Auth, Storage, and Realtime.

FREE TIER QUOTA
2 free projects, 500 MB database, 1 GB file storage, 50,000 monthly active users
✓ Commercial OK•No CC
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Database

Neon Serverless Postgres

9/10

Serverless PostgreSQL with instant branching and scale-to-zero compute.

FREE TIER QUOTA
0.5 GB storage, 1 compute branch, scale-to-zero after inactivity
✓ Commercial OK•No CC
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Database

Upstash Serverless Redis & QStash

9/10

Serverless Redis and HTTP-based message queue for background tasks and rate limiting.

FREE TIER QUOTA
10,000 commands/day free for Redis, 500 messages/day for QStash
✓ Commercial OK•No CC
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Dev Tools

Resend

10/10

Modern email API for developers with React Email component templates.

FREE TIER QUOTA
3,000 emails/month, 100 emails/day, 1 domain
✓ Commercial OK•No CC
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Media

Excalidraw

10/10

Virtual collaborative whiteboard for sketching hand-drawn like architecture diagrams.

FREE TIER QUOTA
100% free & open-source web application with zero login required
✓ Commercial OK•No CC
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Media

Squoosh

10/10

Client-side image compression tool powered by WebAssembly (WebP, AVIF, MozJPEG).

FREE TIER QUOTA
100% free, runs completely client-side in the browser, no upload limits
✓ Commercial OK•No CC
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Media

Ray.so

9/10

Generate beautiful, shareable code snippet screenshots with clean gradients or dark backing.

FREE TIER QUOTA
100% free, unlimited exports, client-side rendering
✓ Commercial OK•No CC
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Dev Tools

Bundlephobia

9/10

Inspect the cost of adding an npm package to your JavaScript bundle before installing.

FREE TIER QUOTA
100% free developer utility, open-source
✓ Commercial OK•No CC
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Compute

Oracle Cloud Always Free ARM

8/10

Up to 4 Ampere A1 ARM cores, 24 GB RAM, and 200 GB block volume that never expires.

FREE TIER QUOTA
4 OCPUs, 24 GB RAM, 200 GB storage permanently free
✓ Commercial OK•CC Req
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Database

Turso (libSQL)

10/10

Distributed SQLite database powered by libSQL with sub-millisecond edge replicas.

FREE TIER QUOTA
9 GB storage, 500 databases, 1B row reads/month
✓ Commercial OK•No CC
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Database

TiDB Serverless

9/10

Autonomous MySQL-compatible serverless database with built-in vector search.

FREE TIER QUOTA
5 GB storage, 50M Request Units/month free
✓ Commercial OK•No CC
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Database

MongoDB Atlas M0

8/10

Fully managed document database with search and aggregation pipelines.

FREE TIER QUOTA
512 MB shared storage, shared RAM, perpetually free
✓ Commercial OK•No CC
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Database

Convex

9/10

Reactive backend-as-a-service with automatic real-time sync and TypeScript schema.

FREE TIER QUOTA
1M function calls/mo, 1 GB database storage, 1 GB file storage
✓ Commercial OK•No CC
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Storage

Backblaze B2

9/10

S3-compatible cloud object storage with free bandwidth alliance to Cloudflare.

FREE TIER QUOTA
10 GB storage, $0 egress fees when routed through Cloudflare
✓ Commercial OK•No CC
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Storage

ImageKit.io

9/10

Real-time image and video optimization CDN with automatic WebP/AVIF delivery.

FREE TIER QUOTA
20 GB bandwidth/month, unlimited image transformations
✓ Commercial OK•No CC
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Compute

Deno Deploy

9/10

Serverless JavaScript, TypeScript, and WebAssembly runtime across 35 edge regions.

FREE TIER QUOTA
100,000 requests/day, 100ms CPU execution time/req
✓ Commercial OK•No CC
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Compute

Fly.io

9/10

Deploy app servers and full Docker containers close to your users on bare metal.

FREE TIER QUOTA
Up to 3 shared-cpu-1x 256MB VMs, 3GB persistent volumes, 160GB egress
✓ Commercial OK•CC Req
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Compute

Koyeb

8/10

Serverless deployment platform with native Docker support and built-in global mesh.

FREE TIER QUOTA
1 Nano instance (512MB RAM, 0.1 vCPU), 55 hours/month active runtime
✓ Commercial OK•No CC
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AI & ML

Cerebras Cloud

10/10

Wafer-scale AI inference delivering up to 1,800 tokens/second on Llama 3.1 8B.

FREE TIER QUOTA
1,000,000 free tokens/day on developer tier
✓ Commercial OK•No CC
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AI & ML

Mistral AI Platform

9/10

Cutting-edge European open-weights and commercial models (Mistral Small, Pixtral, Codestral).

FREE TIER QUOTA
1 req/sec rate limit on free experimental endpoints
✓ Commercial OK•No CC
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AI & ML

Hugging Face Inference API

9/10

Instant serverless API access to 100,000+ open-source machine learning models.

FREE TIER QUOTA
Rate-limited community tier for text, vision, and audio models
✓ Commercial OK•No CC
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AI & ML

OpenRouter Free Models

9/10

Unified gateway providing free access to DeepSeek, Gemma, and community open-weights models.

FREE TIER QUOTA
20+ permanently free open-source models with 0-cent token billing
✓ Commercial OK•No CC
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Dev Tools

WhatsApp Cloud API

9/10

Official Meta cloud API for sending and receiving WhatsApp business messages.

FREE TIER QUOTA
1,000 free service (user-initiated) conversations each month
✓ Commercial OK•No CC
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Dev Tools

Webhook.site

10/10

Instantly test, inspect, and mock incoming HTTP webhooks, requests, and payloads.

FREE TIER QUOTA
100% free web inspection with zero sign-up required
✓ Commercial OK•No CC
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Dev Tools

Svix Webhooks

9/10

Enterprise-grade webhooks-as-a-service with retry mechanisms, security signatures, and portal.

FREE TIER QUOTA
50,000 free webhook messages/month
✓ Commercial OK•No CC
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Dev Tools

Pusher Channels

8/10

Hosted real-time WebSockets infrastructure for notifications, chats, and live metrics.

FREE TIER QUOTA
200,000 messages/day, 100 concurrent connections
✓ Commercial OK•No CC
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Dev Tools

Cloudflare Web Analytics

10/10

Privacy-first, cookie-free web analytics measuring Core Web Vitals and pageviews.

FREE TIER QUOTA
Unlimited sites, unlimited pageviews, zero tracking cookies
✓ Commercial OK•No CC
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Dev Tools

Sentry

9/10

Application performance monitoring, crash diagnostics, and error tracking.

FREE TIER QUOTA
5,000 errors/month, 10,000 performance transactions, 1 user seat
✓ Commercial OK•No CC
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Dev Tools

Better Stack Uptime

10/10

Uptime monitoring, incident alerts via email/SMS, and public status page.

FREE TIER QUOTA
10 monitors, 3-minute check frequency, 1 public status page
✓ Commercial OK•No CC
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Dev Tools

Axiom

9/10

Serverless log management and event intelligence with unlimited queries.

FREE TIER QUOTA
0.5 TB log ingest/month, 30 days data retention
✓ Commercial OK•No CC
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Dev Tools

Mixpanel

9/10

Product event analytics tracking funnels, retention, and user cohorts.

FREE TIER QUOTA
20,000,000 monthly events, core reports, unlimited data history
✓ Commercial OK•No CC
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Dev Tools

DevDocs.io

10/10

Unified documentation browser for 100+ languages, libraries, and frameworks with offline mode.

FREE TIER QUOTA
100% free & open-source, zero ads, runs offline in browser cache
✓ Commercial OK•No CC
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Dev Tools

Regex101

10/10

Interactive regular expression tester with live explanation, substitution, and benchmarking.

FREE TIER QUOTA
100% free web utility with syntax breakdown for PCRE, JavaScript, Python
✓ Commercial OK•No CC
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Frontend

Can I Use

10/10

Up-to-date browser support tables for modern desktop and mobile web standards.

FREE TIER QUOTA
100% free developer reference tool
✓ Commercial OK•No CC
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Dev Tools

JSON Hero

9/10

Clean, interactive JSON visualizer that makes navigating large payloads effortless.

FREE TIER QUOTA
100% free and open-source JSON tool
✓ Commercial OK•No CC
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Dev Tools

Crontab Guru

10/10

Interactive cron schedule expression editor and human-readable explanation calculator.

FREE TIER QUOTA
100% free web utility
✓ Commercial OK•No CC
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Media

TinyPNG

9/10

Smart lossy WebP, PNG, and JPEG compression algorithm preserving transparency.

FREE TIER QUOTA
500 image compressions/month free via official developer API
✓ Commercial OK•No CC
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Media

SVGOMG

10/10

Web GUI for SVGO to optimize vector graphics and strip bloat without visual quality loss.

FREE TIER QUOTA
100% free and open-source client-side SVG tool
✓ Commercial OK•No CC
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Dev Tools

Bruno API Client

10/10

Fast, open-source API client that stores collections in plain text files inside your Git repo.

FREE TIER QUOTA
100% free, offline-first, zero cloud account lock-in
✓ Commercial OK•No CC
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