Have you checked out Crystal?

This page summarizes the projects mentioned and recommended in the original post on /r/rails

InfluxDB – Built for High-Performance Time Series Workloads
InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
www.influxdata.com
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SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives
www.saashub.com
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  1. amber

    A Crystal web framework that makes building applications fast, simple, and enjoyable. Get started with quick prototyping, less bugs, and blazing fast performance. (by amberframework)

    Well, I guess have something to share with you! https://github.com/amberframework/amber

  2. InfluxDB

    InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

    InfluxDB logo
  3. jennifer

    Crystal ORM using ActiveRecord pattern with flexible query DSL

    For a more concrete example, I don't think you can have ActiveRecord-like classes which have their fields defined by fetching actual database schema (without defining the schema upfront, like Jennifer does).

  4. sorbet

    A fast, powerful type checker designed for Ruby

    If what you're looking for is typed Ruby, check out Sorbet https://sorbet.org/. It can be integrated (piecemeal) into existing Rails projects.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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