I'm having trouble understanding what Rack does. Could you explain-like-I-am-a-beginner? with real examples if possible please.

This page summarizes the projects mentioned and recommended in the original post on /r/ruby
Web Servers Ruby Appserver Application Server Server

InfluxDB - Power Real-Time Data Analytics at Scale
Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
www.influxdata.com
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SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives
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  • Puma

    A Ruby/Rack web server built for parallelism

    • Here's Puma's implementation, and Here's Passenger's implementation.

  • Phusion Passenger

    A fast and robust web server and application server for Ruby, Python and Node.js

    • Here's Puma's implementation, and Here's Passenger's implementation.

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

    InfluxDB logo
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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