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https://github.com/alexarchambault/ammonite-spark made the experience more pleasant for me.
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InfluxDB
Purpose built for real-time analytics at any scale. InfluxDB Platform is powered by columnar analytics, optimized for cost-efficient storage, and built with open data standards.
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JustEnoughScalaForSpark
A tutorial on the most important features and idioms of Scala that you need to use Spark's Scala APIs.
There's literally something called, "Just enough Scala for Spark." https://github.com/deanwampler/JustEnoughScalaForSpark
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.