free-for.dev is a list of software (SaaS, PaaS, IaaS, etc.) and other offerings that have free tiers for developers. With this list the developers and open source authors can make informed decisions on the services. The scope of this particular list is limited to things infrastructure developers (System Administrator, DevOps Practitioners, etc.) are likely to find useful.
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This list is the result of Pull Requests, reviews, ideas and work done by 500+ people, you too can help by sending Pull Requests to add more services or by removing ones whose offerings have changed or been retired.

NOTE: This list is only for as-a-Service offerings, not for self-hosted software. For a service to be eligible it has to offer a Free Tier and not just a free trial. If the Free Tier is time bucketed it has to be at least a year.

“Nothing is actually free, it never is.”
-Rushi