Softwares - Open Source Schedulers , Caprover, Luigi
Heroku Alternatives
Dokku - The smallest PaaS implementation you’ve ever seen
CapRover · Scalable, Free and Self-hosted PaaS!
Scalable, Free and Self-hosted PaaS!

Sql Based Api
Latitude | Developer-first embedded analytics
Latitude is an embedded analytics framework designed with developers in mind. It integrates seamlessly with your database or data warehouse, leveraging SQL and straightforward frontend components.

Open source Schedulers
GitHub - jhuckaby/Cronicle: A simple, distributed task scheduler and runner with a web based UI.
A simple, distributed task scheduler and runner with a web based UI. - jhuckaby/Cronicle
Cronicle
A simple distributed task scheduler and runner.
https://dolphinscheduler.apache.org/en-us
Apache DolphinScheduler is a distributed and extensible open-source workflow orchestration platform with powerful DAG visual interfaces
Getting Started — Luigi 3.5.0 documentation

Luigi is a Python (3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 tested) package that helps you build complex pipelines of batch jobs. It handles dependency resolution, workflow management, visualization, handling failures, command line integration, and much more