Have you checked out Crystal?

1. amber

   1 11 2,593 3.4 Crystal

   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

   www.influxdata.com featured

   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.

   

3. jennifer

   2 3 424 3.2 Crystal

   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

   3 59 3,689 9.9 Ruby

   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.

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