Scala

DataStax Spark Cassandra Connectordatastax/spark-cassandra-connector

A connector that enables Apache Spark to read from and write to Apache Cassandra databases for distributed data processing.

monixmonix/monix

A high-performance Scala library for composing asynchronous, event-based programs with strong functional programming influences.

skunktypelevel/skunk

A purely functional, type-safe data access library for Scala applications using PostgreSQL.

Apache Pekkoapache/incubator-pekko

Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala with the Actor Model.

spark-testing-baseholdenk/spark-testing-base

Base classes for writing Apache Spark tests in Scala and Python, simplifying test setup and teardown.

MLeapcombust/mleap

MLeap is a portable execution engine for deploying machine learning pipelines from Spark and Scikit-learn without their runtime dependencies.

sttpsoftwaremill/sttp

A clean, type-safe HTTP client for Scala supporting synchronous, Future-based, and functional effect system programming styles.

FiloDBfilodb/FiloDB

A distributed, Prometheus-compatible, real-time, in-memory time series database designed for massive scalability and low-latency operational metrics.

scoptscopt/scopt

A Scala library for parsing command-line options with functional and object-oriented DSLs.

Reactive Kafkaakka/alpakka-kafka

A Reactive Streams connector for Apache Kafka built on Akka Streams, enabling back-pressured integration for Java and Scala.

ScalaPBscalapb/ScalaPB

Protocol buffer compiler plugin for Scala that generates case classes, parsers, and serializers.

Sharryeikek/sharry

A self-hosted web application for sharing files with password protection, expiration dates, and alias pages.

chimneyscalalandio/chimney

A Scala library for boilerplate-free, type-safe data transformations between case classes, Java beans, and other data structures.

GraphFramesgraphframes/graphframes

A DataFrame-based graph processing library for Apache Spark, enabling scalable graph analytics and algorithms.

ScalaTestscalatest/scalatest

A free, open-source testing toolkit for Scala and Java programmers with expressive and flexible testing styles.

Nodewavesplatform/Waves

Reference implementation of the Waves blockchain node in Scala, enabling decentralized application development.

Pact JVMDiUS/pact-jvm

JVM implementation of Pact for consumer-driven contract testing, providing mock services and verification tools.

FastParsecom-lihaoyi/fastparse

A Scala library for building fast parsers using parser combinators with minimal boilerplate.

Hailhail-is/hail

An open-source, Python-based data analysis tool with specialized data types and methods for genomic data at scale.

DSL-JSONngs-doo/dsl-json

A high-performance JVM JSON library with compile-time databinding for Java, Android, Scala, and Kotlin.

DSL-JSONngs-doo/dsl-json

A high-performance JVM JSON library with advanced compile-time databinding for Java, Android, Scala, and Kotlin.

ADAMbigdatagenomics/adam

A genomics analysis platform that uses Apache Spark to parallelize genomic data processing across clusters, replacing traditional file-based workflows.

calibanghostdogpr/caliban

A purely functional GraphQL library for Scala with minimal boilerplate and compile-time schema validation.

Vireotwitter/vireo

A lightweight, versatile C++11 video processing library with a unified interface for transcoding, remuxing, trimming, and more.

TensorFlow Scalaeaplatanios/tensorflow_scala

A strongly-typed Scala API for TensorFlow, providing functionality similar to the official Python API with additional features.

Squantstypelevel/squants

A Scala library for type-safe quantities, units of measure, and dimensional analysis.

ReactiveMongoReactiveMongo/ReactiveMongo

A fully non-blocking, asynchronous MongoDB driver for Scala built on reactive streams.

Quicklenssoftwaremill/quicklens

A Scala library for modifying deeply nested fields in case classes with a concise, type-safe syntax.

Apache Samzaapache/samza

A distributed stream processing framework built on Apache Kafka and Apache Hadoop YARN for fault-tolerant, stateful processing.

Matryoshkaslamdata/matryoshka

A Scala library providing generalized recursion schemes and traversals for fixed point data structures.

jsoniter-scalaplokhotnyuk/jsoniter-scala

Scala macros for compile-time generation of safe and ultra-fast JSON codecs, with circe integration.

Photon MLlinkedin/photon-ml

A scalable machine learning library for training Generalized Linear Models and GLMix models on Apache Spark.

scalatagscom-lihaoyi/scalatags

A small XML/HTML construction library for Scala that provides type-safe, composable HTML generation.

spark-dariamrpowers-io/spark-daria

A Scala library providing essential Spark extensions, helper methods, and custom transformations to maximize developer productivity.

uPicklecom-lihaoyi/upickle

A simple, fast, dependency-free JSON and MessagePack serialization library for Scala.

Figarop2t2/figaro

A probabilistic programming language built on Scala for creating rich probabilistic models and performing automated reasoning.