Trending repositories
Ranked by Attention Score: stars gained over the last 30 complete days
66 repositories by Attention Score · Oct 4, 2026 – Nov 2, 2026 (UTC)
2.apache / spark
Apache Spark - A unified analytics engine for large-scale data processing
3.lichess-org / lila
♞ lichess.org: the forever free, adless and open source chess server ♞
- scala
- chess
- play-framework
- non-profit
- functional-programming
- type-safe
- +4 more
4.twitter / the-algorithm
Source code for the X Recommendation Algorithm
5.delta-io / delta
An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs
6.gitbucket / gitbucket
A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility
- scala
- gitbucket
- git
- scalatra
7.apache / pekko
Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala
- actor-model
- cloud-native
- concurrency
- distributed-actors
- distributed-systems
- high-performance
- +4 more
8.snowplow / snowplow
The leader in Customer Data Infrastructure
- snowplow
- analytics
- data
- data-pipeline
- data-collection
- product-analytics
- +3 more
9.typelevel / cats
Lightweight, modular, and extensible library for functional programming.
10.awslabs / deequ
Deequ is a library built on top of Apache Spark for defining "unit tests for data", which measure data quality in large datasets.
- dataquality
- spark
- unit-testing
- scala
12.apache / kyuubi
Apache Kyuubi is a distributed and multi-tenant gateway to provide serverless SQL on data warehouses and lakehouses.
13.rtyley / bfg-repo-cleaner
Removes large or troublesome blobs like git-filter-branch does, but faster. And written in Scala
14.microsoft / SynapseML
Simple and Distributed Machine Learning Python Library porting ML algorithms for Spark
15.scala / scala
Scala 2 compiler and standard library. Scala 2 bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3
- scala
- scala-compiler
- scala-programming-language
- scala-library
- jvm-languages
- functional-programming
- +1 more
16.softwaremill / elasticmq
In-memory message queue with an Amazon SQS-compatible interface. Runs stand-alone or embedded.
- scala
- sqs-interface
- elasticmq
- amazon-sqs
- aws
- aws-sqs
- +1 more
17.com-lihaoyi / mill
A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-7x faster dev workflows than other JVM build tools
- scala
- build-tool
- build-system
- java
- scala-js
- scala-native
- +4 more
18.akka / akka-core
A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.
- reactive
- distributed-systems
- concurrency
- high-performance
- akka
- actor-model
- +3 more
19.gatling / gatling
Modern Load Testing as Code
- netty
- scala
- loadtesting
- automation
- gatling
- load-testing
- +13 more
20.playframework / playframework
The Community Maintained High Velocity Web Framework For Java and Scala.
- scala
- java
- reactive
- web-framework
- restful
- play
- +5 more
21.yahoo / CMAK
CMAK is a tool for managing Apache Kafka clusters
22.apache / openwhisk
Apache OpenWhisk is an open source serverless cloud platform
- openwhisk
- apache
- serverless
- cloud
- faas
- functions-as-a-service
- +5 more
24.broadinstitute / cromwell
Scientific workflow engine designed for simplicity & scalability. Trivially transition between one off use cases to massive scale production environments
- workflow-execution
- workflow
- cloud
- hpc
- bioinformatics
- executor
- +7 more
25.prisma / prisma1Archived
💾 Database Tools incl. ORM, Migrations and Admin UI (Postgres, MySQL & MongoDB) [deprecated]
- orm
- database
- graphql
- datamapper
- serverless
- dao
- +1 more
26.lhartikk / ArnoldC
Arnold Schwarzenegger based programming language
28.monix / monix
Asynchronous, Reactive Programming for Scala and Scala.js.
- scala
- monix
- typelevel
- functional-programming
- reactive-programming
- fp
- +4 more
29.nymanjens / piga
List editor for power users, backed by a self-hosted server
- selfhosted
- todolist
- website
30.apache / predictionioArchived
PredictionIO, a machine learning server for developers and ML engineers.
- scala
- big-data
- predictionio
31.typelevel / fs2
Compositional, streaming I/O library for Scala
- scala
- stream
- streaming-computation
- fp
- functional-programming
33.scalaz / scalaz
Principled Functional Programming in Scala
- scalaz
- scala
- functional-programming
- scala-native
- scalajs
34.sangria-graphql / sangria
Scala GraphQL implementation
35.typelevel / skunk
A data access library for Scala + Postgres.
- scala
- postgres
- functional-programming
- cats
- cats-effect
- fs2
- +3 more
37.graphframes / graphframes
GraphFrames is a package for Apache Spark which provides DataFrame-based Graphs
- apache-spark
- big-data
- connected-components
- dataframe
- dataframes
- graphs
- +8 more
39.scalacenter / bloop
Bloop is a build server and CLI tool to compile, test and run Scala fast from any editor or build tool.
- scala
- productivity
- developer-tools
- compilation-server
- java
- build-system
- +1 more
40.TouK / nussknacker
Low-code tool for automating actions on real time data | Stream processing for the users.
- flink
- flink-kafka
- apache-flink
- gui
- touk
- real-time
- +13 more
41.helgeho / ArchiveSpark
An Apache Spark framework for easy data processing, extraction as well as derivation for web archives and archival collections, developed at Internet Archive.
- archivespark
- spark-framework
- spark
- web-archiving
- webarchive
- internet-archive
- +1 more
42.archivesunleashed / aut
The Archives Unleashed Toolkit is an open-source toolkit for analyzing web archives.
- spark
- hadoop
- webarchives
- analysis
- apache-spark
- scala
- +8 more
43.JohnSnowLabs / spark-nlp
State of the Art Natural Language Processing
- nlp
- natural-language-processing
- spark
- pyspark
- named-entity-recognition
- sentiment-analysis
- +14 more
45.filodb / FiloDB
Distributed Prometheus time series database
- scala
- time-series
- database
- distributed
- prometheus
- metrics
- +2 more
46.scalalandio / chimney
Scala library for boilerplate-free, type-safe data transformations
- scala
- boilerplate
- generic-programming
- automatic-conversion
- auto-mapping
- data-rewriting
- +12 more
47.scalatest / scalatest
A testing tool for Scala and Java developers
48.wavesplatform / Waves
⛓️ Reference Waves Blockchain Node (client) implementation on Scala
- blockchain
- cryptography
- smart-contracts
- decentralized-applications
49.apache / livy
Apache Livy is an open source REST interface for interacting with Apache Spark from anywhere.
51.dbpedia-spotlight / dbpedia-spotlightArchived
DBpedia Spotlight is a tool for automatically annotating mentions of DBpedia resources in text.
- dbpedia-spotlight
- nlp
- semantic-web
- entity-linking
- text-annotation
- content-tagging
- +2 more
52.gearpump / gearpump
Lightweight real-time big data streaming engine over Apache Pekko
- akka
- stream-processing
- bigdata
- scala
53.etorreborre / specs2
Software Specifications for Scala
54.Interana / eventsim
Event data simulator. Generates a stream of pseudo-random events from a set of users, designed to simulate web traffic.
55.com-lihaoyi / sourcecode
Scala library providing "source" metadata to your program, similar to Python's __name__, C++'s __LINE__ or Ruby's __FILE__.
57.twitter / storehaus
Storehaus is a library that makes it easy to work with asynchronous key value stores
58.neo4j / neo4j-spark-connector
Neo4j Connector for Apache Spark, which provides bi-directional read/write access to Neo4j from Spark, using the Spark DataSource APIs
- spark
- neo4j-connector
- cypher
- neo4j-driver
- bolt
- hacktoberfest
59.scalaprops / scalaprops
property based testing library for Scala
- scalaz
- testing
- scala
- scalaprops
- prng
- mersenne-twister
- +5 more
60.lolgab / snunit
Scala Native HTTP server based on FreeUnit
- nginx-unit
- scala-native
- http-server
- scala
- serverless
- cask
- +3 more
61.ekrich / sconfig
Scala configuration library supporting HOCON for Scala, Java, Scala.js, and Scala Native
- scala
- scala-native
- scala-js
- config
- hocon
- java
- +1 more
62.outr / reactify
The first and only true Functional Reactive Programming framework for Scala.
- scala
- reactive
- frp
- frp-library
- rx
63.lolgab / scalaui
Scala Native GUI framework
- scala
- scala-native
- gui
- win32
- immediate-mode
- immediate-mode-gui
- +3 more
64.h0ngcha0 / bitcoin4s
A Bitcoin Script Interpreter and Debugger in Scala
65.sparsetech / toml-scalaArchived
TOML parser with codec derivation for the Scala platform
- scala
- scala-native
- toml
- shapeless
- scalajs
66.galax-io / gatling-kafka-plugin
Gatling plugin for Apache Kafka — produce, request-reply, and consume load testing with Avro, Protobuf, and Schema Registry support
- gatling
- kafka
- performance
- performance-testing
- avro
- java
- +5 more