Free Tier (26)

• Access Cloud Services for Free (oracle.com) tool
  Always Free OCI compute and storage with no time limit, plus a 30-day US$300 trial credit
  Public Cloud #
• Free Cloud Computing Services - AWS Free Tier (Amazon Web Services, Inc.) reference
  what AWS gives away: 30+ always-free services within monthly limits, plus $200 new-account credits
  Public Cloud #
• Free Trial and Free Tier Services and Products (Google Cloud) reference
  What GCP gives away: $300 trial credit plus 20+ always-free monthly limits, e2-micro to 1 TB BigQuery
  Public Cloud #
• Explore Free Azure Services | Microsoft Azure (azure.microsoft.com) reference
  which Azure services are always free versus free for 12 new-customer months, plus $100 credit
  Public Cloud #
• Free Plan Overview (cloudflare.com) organisation
  what Cloudflare hands out at no cost: DDoS protection, CDN, DNS, TLS and basic load balancing
  Caching DNS TLS #
• Fly.io Resource Pricing (Fly) reference
  usage-based billing for Fly.io machines and resources, per organisation; card on file required
  Public Cloud #
• Pricing and Plans | Netlify (Netlify) reference
  credit-metered static and serverless hosting plans: compute, bandwidth, requests; free Starter tier
  Continuous Integration Public Cloud #
• Experience Red Hat Enterprise Linux | Red Hat interactive labs (redhat.com) tutorial
  no-cost browser sandboxes for RHEL: dnf/rpm, SELinux, crypto policy, firewall via Ansible system roles
  Enterprise Linux Interactive Lab Red Hat #
• Oracle Linux (oracle.com) tool
  RHEL-compatible distro free to download, use and redistribute, with paid Premier Support alongside
  Commercial Support Distro Enterprise Linux #
• Oracle Linux Yum Server (yum.oracle.com) reference
  no-cost public RPM repositories for Oracle Linux plus EPEL, ISO verification and install notes
  Enterprise Linux Package Manager RPM #
• Evaluation Copy of SUSE Linux Enterprise Server | SUSE (suse.com) organisation
  SLES evaluation images and update channels, gated behind a no-cost Customer Center registration
  Enterprise Linux SUSE #
• Ubuntu Pro | Ubuntu (Ubuntu) organisation
  Canonical's security and compliance subscription: 10-year LTS coverage, free for personal use on 5 machines
  Commercial Support Patch Management Ubuntu #
• CIS Benchmarks® (CIS) reference
  consensus hardening baselines for 25+ product families; free PDFs, tailoring needs paid membership
  Security Compliance Security Hardening #
• Free Backup for Linux workloads - Veeam Agent for Linux (Veeam Software) tool
  No-cost single-machine Linux backup agent, file and volume level, changed-block tracking
  Backup Disaster Recovery #
• Red Hat Universal Base Image - Red Hat Ecosystem Catalog (catalog.redhat.com) reference
  freely redistributable RHEL-derived OCI base images: platform, minimal, micro, plus runtime images
  Container Enterprise Linux Red Hat #
• OpenLiteSpeed (openlitespeed.org) tool
  Free open-source LiteSpeed edition: event-driven, mod_rewrite-compatible, WebAdmin GUI, page cache
  Caching Web Server #
• Cloudflare Tunnel (Cloudflare Docs) reference
  cloudflared outbound-only tunnels exposing HTTP, SSH and RDP origins with no public IP; free tier available
  Reverse Proxy Self Hosting VPN #
• Documentation (letsencrypt.org) reference
  Free automated ACME certificate authority: client choices, rate limits, chains of trust, staging
  PKI TLS #
• Certbot (certbot.eff.org) tool
  EFF's ACME client automating free Let's Encrypt certificates, with per-server install instructions
  PKI TLS Web Server #
• Linux Professional Institute – Learning (learning.lpi.org) reference
  hub for LPI's freely published, open-licensed courseware for teachers preparing candidates for its exams
  Certification System Administration #
• Introduction to Linux (LFS101) | Linux Foundation Education (Linux Foundation - Education) tutorial
  no-cost self-paced beginner course: CLI basics, graphical config, major distro families
  Command Line System Administration #
• SQL Server Downloads | Microsoft (microsoft.com) tool
  installer downloads per SQL Server edition; Express and Developer free, trials for the rest
  Database Administration Relational Database #
• Oracle AI Database Free | Oracle (oracle.com) tool
  no-cost Oracle 26ai edition capped at 2 CPUs, 2 GB RAM and 12 GB data; formerly Express Edition
  Database Administration Relational Database #
• Db2 | IBM (ibm.com) tool
  IBM enterprise database for mixed transactional and analytic workloads; free Community Edition
  Commercial Support Relational Database #
• Neo4j documentation - Neo4j Documentation (Neo4j Graph Data Platform) reference
  graph database docs: deployment on Docker/Kubernetes, visual tooling, client libraries; free Community Edition
  Database Administration Graph Database #
• Docs · Tailscale Docs (Tailscale) reference
  WireGuard mesh overlay: access control, subnet routers, exit nodes, logging; no-cost personal tier
  Network Routing VPN #