https://github.com/255kb/stack-on-a-budget

GitHub - awesome-selfhosted/awesome-selfhosted: A list of Free Software network services and web applications which can be hosted on your own servers

GitHub - ripienaar/free-for-dev: A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev

Free for Developers

https://github.com/swiftwave-org/swiftwave

https://github.com/topics/paas

https://github.com/lastbackend/lastbackend