其他免费资源 Other Free Resources

A better *.localhost.direct Wildcard public CA signed SSL cert for localhost development with sub-domain support

Collection of free services for students. Registration required.

A website that allows you to design and test glob patterns. It also provides resources to learn glob patterns.

Interactive playground in your browser to study Linux, Kubernetes, Containers, Programming, DevOps, Networking

Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform. The subscription is a 90-day Microsoft 365 E5 Subscription (Windows excluded) which is renewable. It is renewed if you're active in development(measured using telemetry data & algorithms).

Easy-to-understand and free MySQL EXPLAIN output visualizer to optimize slow queries.

Free access to Red Hat products including RHEL, OpenShift, CodeReady, etc. exclusively for developers. Individual plan only. Free e-books are also offered for reference.

Send and receive test SMS messages for free.

Backup automation service for servers and databases (MySQL, PostgreSQL, MongoDB) stored directly into cloud storage providers (AWS, DigitalOcean, and Backblaze). Provides a free plan for 1 backup.

Hassle-free MySQL backup restoration. Restore MySQL backups to any remote database without code or a server.

Backup solution for DigitalOcean, AWS, LightSail, Hetzner, and Exoscale, with support for direct database, file system and application backups to s3 based storage. Provides a free plan with daily backups for one resource.

Automated server backups and snapshots across 8 cloud providers, stored in your own bucket or Google Drive. Free plan: 1 server, daily backups, no credit card.