[Github Ranking](../README.md)
==========

## Top 100 Stars in Scala

| Ranking | Project Name | Stars | Forks | Language | Open Issues | Description | Last Commit |
| ------- | ------------ | ----- | ----- | -------- | ----------- | ----------- | ----------- |
| 1 | [the-algorithm](https://github.com/twitter/the-algorithm) | 73933 | 13275 | Scala | 335 | Source code for the X Recommendation Algorithm | 2025-09-08T18:40:54Z |
| 2 | [spark](https://github.com/apache/spark) | 44023 | 29396 | Scala | 28 | Apache Spark - A unified analytics engine for large-scale data processing | 2026-09-22T00:34:01Z |
| 3 | [lila](https://github.com/lichess-org/lila) | 18759 | 2792 | Scala | 1223 | ♞ lichess.org: the forever free, adless and open source chess server ♞ | 2026-09-22T00:32:46Z |
| 4 | [prisma1](https://github.com/prisma/prisma1) | 16376 | 838 | Scala | 2 | 💾 Database Tools incl. ORM, Migrations and Admin UI (Postgres, MySQL & MongoDB) [deprecated] | 2022-09-01T18:57:41Z |
| 5 | [scala](https://github.com/scala/scala) | 14562 | 3218 | Scala | 0 | Scala 2 compiler and standard library. Scala 2 bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3 | 2026-09-09T07:18:01Z |
| 6 | [akka-core](https://github.com/akka/akka-core) | 13279 | 3532 | Scala | 872 | A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments. | 2026-09-21T14:12:13Z |
| 7 | [playframework](https://github.com/playframework/playframework) | 12617 | 4020 | Scala | 410 | The Community Maintained High Velocity Web Framework For Java and Scala. | 2026-09-15T12:00:53Z |
| 8 | [predictionio](https://github.com/apache/predictionio) | 12518 | 1895 | Scala | 0 | PredictionIO, a machine learning server for developers and ML engineers. | 2021-01-09T10:30:58Z |
| 9 | [bfg-repo-cleaner](https://github.com/rtyley/bfg-repo-cleaner) | 12190 | 582 | Scala | 265 | Removes large or troublesome blobs like git-filter-branch does, but faster. And written in Scala | 2025-01-19T18:52:14Z |
| 10 | [CMAK](https://github.com/yahoo/CMAK) | 11923 | 2472 | Scala | 499 | CMAK is a tool for managing Apache Kafka clusters | 2023-08-02T19:26:23Z |
| 11 | [gitbucket](https://github.com/gitbucket/gitbucket) | 9406 | 1269 | Scala | 301 | A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility | 2026-09-20T07:15:25Z |
| 12 | [delta](https://github.com/delta-io/delta) | 9018 | 2181 | Scala | 387 | An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs | 2026-09-21T16:11:42Z |
| 13 | [finagle](https://github.com/twitter/finagle) | 8866 | 1428 | Scala | 59 | A fault tolerant, protocol-agnostic RPC system | 2026-08-13T18:10:51Z |
| 14 | [snowflake](https://github.com/twitter-archive/snowflake) | 7759 | 1110 | Scala | 2 | Snowflake is a network service for generating unique ID numbers at high scale with some simple guarantees. | 2020-07-22T18:08:14Z |
| 15 | [XiangShan](https://github.com/OpenXiangShan/XiangShan) | 7272 | 946 | Scala | 115 | Open-source high-performance RISC-V processor | 2026-09-22T03:50:13Z |
| 16 | [snowplow](https://github.com/snowplow/snowplow) | 7034 | 1172 | Scala | 59 | The leader in Customer Data Infrastructure | 2026-06-26T12:44:39Z |
| 17 | [gatling](https://github.com/gatling/gatling) | 6957 | 1207 | Scala | 17 | Modern Load Testing as Code | 2026-09-18T09:11:45Z |
| 18 | [ArnoldC](https://github.com/lhartikk/ArnoldC) | 6885 | 293 | Scala | 69 | Arnold Schwarzenegger based programming language | 2024-01-31T22:40:52Z |
| 19 | [openwhisk](https://github.com/apache/openwhisk) | 6797 | 1179 | Scala | 406 | Apache OpenWhisk is an open source serverless cloud platform | 2026-09-08T15:46:34Z |
| 20 | [scala3](https://github.com/scala/scala3) | 6299 | 1179 | Scala | 1708 | The Scala 3 compiler, also known as Dotty. | 2026-09-21T20:27:19Z |
| 21 | [frontend](https://github.com/guardian/frontend) | 5899 | 573 | Scala | 190 | The Guardian DotCom. | 2026-09-21T17:23:47Z |
| 22 | [fpinscala](https://github.com/fpinscala/fpinscala) | 5862 | 3036 | Scala | 79 | Code, exercises, answers, and hints to go along with the book "Functional Programming in Scala" | 2024-12-11T18:19:58Z |
| 23 | [cats](https://github.com/typelevel/cats) | 5466 | 1245 | Scala | 224 | Lightweight, modular, and extensible library for functional programming. | 2026-09-21T01:58:40Z |
| 24 | [linkerd](https://github.com/linkerd/linkerd) | 5307 | 493 | Scala | 134 | Old repo for Linkerd 1.x. See the linkerd2 repo for Linkerd   2.x. | 2023-03-04T18:59:40Z |
| 25 | [SynapseML](https://github.com/microsoft/SynapseML) | 5246 | 868 | Scala | 137 | Simple and Distributed Machine Learning Python Library porting ML algorithms for Spark | 2026-09-22T03:36:35Z |
| 26 | [sbt](https://github.com/sbt/sbt) | 4954 | 1047 | Scala | 458 | sbt, the interactive build tool | 2026-09-21T18:29:57Z |
| 27 | [aerosolve](https://github.com/airbnb/aerosolve) | 4807 | 562 | Scala | 6 | A machine learning package built for humans. | 2025-11-06T00:53:40Z |
| 28 | [chisel](https://github.com/chipsalliance/chisel) | 4786 | 659 | Scala | 353 | Chisel: A Modern Hardware Design Language | 2026-09-21T23:09:56Z |
| 29 | [scala-js](https://github.com/scala-js/scala-js) | 4709 | 408 | Scala | 37 | Scala.js, the Scala to JavaScript compiler | 2026-09-15T13:49:38Z |
| 30 | [scala-native](https://github.com/scala-native/scala-native) | 4693 | 394 | Scala | 340 | Your favorite language gets closer to bare metal. | 2026-09-15T16:51:50Z |
| 31 | [scalaz](https://github.com/scalaz/scalaz) | 4666 | 697 | Scala | 123 | Principled Functional Programming in Scala | 2026-09-19T22:13:14Z |
| 32 | [zio](https://github.com/zio/zio) | 4420 | 1588 | Scala | 154 | ZIO — A type-safe, composable library for async and concurrent programming in Scala | 2026-09-21T00:57:46Z |
| 33 | [chronos](https://github.com/mesos/chronos) | 4373 | 518 | Scala | 210 | Fault tolerant job scheduler for Mesos which handles dependencies and ISO8601 based schedules | 2022-06-29T19:43:36Z |
| 34 | [spark-nlp](https://github.com/JohnSnowLabs/spark-nlp) | 4159 | 744 | Scala | 17 | State of the Art Natural Language Processing | 2026-09-21T15:20:58Z |
| 35 | [marathon](https://github.com/d2iq-archive/marathon) | 4026 | 830 | Scala | 27 | Deploy and manage containers (including Docker) on top of Apache Mesos at scale. | 2022-09-08T05:13:23Z |
| 36 | [TheHive](https://github.com/TheHive-Project/TheHive) | 3950 | 695 | Scala | 821 | TheHive is a Collaborative Case Management Platform, now distributed as a commercial version | 2025-07-25T13:57:27Z |
| 37 | [rocket-chip](https://github.com/chipsalliance/rocket-chip) | 3869 | 1303 | Scala | 274 | Rocket Chip Generator | 2026-09-13T01:04:13Z |
| 38 | [diffy](https://github.com/twitter-archive/diffy) | 3811 | 360 | Scala | 0 | Find potential bugs in your services with Diffy | 2020-07-01T19:13:06Z |
| 39 | [deequ](https://github.com/awslabs/deequ) | 3648 | 586 | Scala | 62 | Deequ is a library built on top of Apache Spark for defining "unit tests for data", which measure data quality in large datasets. | 2026-09-16T18:31:48Z |
| 40 | [atlas](https://github.com/Netflix/atlas) | 3566 | 358 | Scala | 7 | In-memory dimensional time series database. | 2026-09-21T19:01:49Z |
| 41 | [scalding](https://github.com/twitter/scalding) | 3524 | 699 | Scala | 287 | A Scala API for Cascading | 2023-05-28T19:18:59Z |
| 42 | [joern](https://github.com/joernio/joern) | 3515 | 458 | Scala | 301 | Open-source code analysis platform for C/C++/Java/Binary/Javascript/Python/Kotlin based on code property graphs. Discord https://discord.gg/vv4MH284Hc | 2026-09-21T18:26:23Z |
| 43 | [CoolplaySpark](https://github.com/lw-lin/CoolplaySpark) | 3474 | 1376 | Scala | 31 | 酷玩 Spark: Spark 源代码解析、Spark 类库等 | 2022-05-18T08:55:54Z |
| 44 | [breeze](https://github.com/scalanlp/breeze) | 3453 | 690 | Scala | 88 | Breeze is/was a numerical processing library for Scala. | 2025-10-04T22:40:06Z |
| 45 | [shapeless](https://github.com/milessabin/shapeless) | 3400 | 520 | Scala | 27 | Generic programming for Scala | 2026-09-11T05:15:51Z |
| 46 | [flockdb](https://github.com/twitter-archive/flockdb) | 3314 | 245 | Scala | 0 | A distributed, fault-tolerant graph database | 2017-03-16T23:11:18Z |
| 47 | [shadowsocksr-v2ray-trojan-android](https://github.com/xxf098/shadowsocksr-v2ray-trojan-android) | 3161 | 373 | Scala | 93 | A simple client for Android | 2024-02-25T00:32:29Z |
| 48 | [Spark-The-Definitive-Guide](https://github.com/databricks/Spark-The-Definitive-Guide) | 3151 | 2906 | Scala | 25 | Spark: The Definitive Guide's Code Repository | 2020-08-26T08:17:35Z |
| 49 | [elasticmq](https://github.com/softwaremill/elasticmq) | 2936 | 203 | Scala | 19 | In-memory message queue with an Amazon SQS-compatible interface. Runs stand-alone or embedded. | 2026-09-19T00:47:25Z |
| 50 | [spark-jobserver](https://github.com/spark-jobserver/spark-jobserver) | 2836 | 968 | Scala | 108 | REST job server for Apache Spark | 2026-03-03T12:09:21Z |
| 51 | [mill](https://github.com/com-lihaoyi/mill) | 2795 | 447 | Scala | 176 | 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 | 2026-09-21T19:43:28Z |
| 52 | [kestrel](https://github.com/twitter-archive/kestrel) | 2753 | 307 | Scala | 24 | simple, distributed message queue system (inactive) | 2016-01-22T07:54:28Z |
| 53 | [node2vec](https://github.com/aditya-grover/node2vec) | 2740 | 904 | Scala | 82 | None | 2022-07-21T14:37:25Z |
| 54 | [util](https://github.com/twitter/util) | 2719 | 570 | Scala | 5 | Wonderful reusable code from Twitter | 2025-12-08T14:10:27Z |
| 55 | [slick](https://github.com/slick/slick) | 2665 | 612 | Scala | 388 | Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala | 2026-09-11T02:47:28Z |
| 56 | [scalatra](https://github.com/scalatra/scalatra) | 2648 | 334 | Scala | 63 | Tiny Scala high-performance, async web framework, inspired by Sinatra | 2026-09-21T01:57:09Z |
| 57 | [scala-exercises](https://github.com/scala-exercises/scala-exercises) | 2645 | 535 | Scala | 47 | The easy way to learn Scala. | 2025-09-23T13:18:05Z |
| 58 | [scio](https://github.com/spotify/scio) | 2630 | 534 | Scala | 111 | A Scala API for Apache Beam and Google Cloud Dataflow. | 2026-09-21T15:54:16Z |
| 59 | [Ammonite](https://github.com/com-lihaoyi/Ammonite) | 2629 | 365 | Scala | 127 | Scala Scripting | 2026-08-31T03:40:12Z |
| 60 | [lagom](https://github.com/lagom/lagom) | 2627 | 618 | Scala | 446 | Reactive Microservices for the JVM | 2023-08-14T13:43:48Z |
| 61 | [http4s](https://github.com/http4s/http4s) | 2626 | 817 | Scala | 265 | A minimal, idiomatic Scala interface for HTTP | 2026-09-20T06:01:50Z |
| 62 | [circe](https://github.com/circe/circe) | 2540 | 546 | Scala | 110 | Yet another JSON library for Scala | 2026-09-14T08:06:24Z |
| 63 | [spray](https://github.com/spray/spray) | 2493 | 548 | Scala | 69 | A suite of scala libraries for building and consuming RESTful web services on top of Akka: lightweight, asynchronous, non-blocking, actor-based, testable | 2017-02-21T11:03:37Z |
| 64 | [SZT-bigdata](https://github.com/geekyouth/SZT-bigdata) | 2476 | 611 | Scala | 1 | 深圳地铁大数据客流分析系统🚇🚄🌟 | 2026-05-12T06:07:08Z |
| 65 | [fs2](https://github.com/typelevel/fs2) | 2453 | 635 | Scala | 103 | Compositional, streaming I/O library for Scala | 2026-09-19T08:19:12Z |
| 66 | [metarank](https://github.com/metarank/metarank) | 2443 | 107 | Scala | 91 | A low code Machine Learning personalized ranking service for articles, listings, search results, recommendations that boosts user engagement. A friendly Learn-to-Rank engine | 2026-09-09T07:56:09Z |
| 67 | [chipyard](https://github.com/ucb-bar/chipyard) | 2392 | 919 | Scala | 157 | An Agile RISC-V SoC Design Framework with in-order cores, out-of-order cores, accelerators, and more | 2026-09-21T22:25:01Z |
| 68 | [kyuubi](https://github.com/apache/kyuubi) | 2366 | 1021 | Scala | 483 | Apache Kyuubi is a distributed and multi-tenant gateway to provide serverless SQL on data warehouses and lakehouses. | 2026-09-20T16:30:06Z |
| 69 | [metals](https://github.com/scalameta/metals) | 2332 | 442 | Scala | 251 | Scala language server with rich IDE features 🚀  | 2026-09-21T09:05:09Z |
| 70 | [algebird](https://github.com/twitter/algebird) | 2296 | 345 | Scala | 73 | Abstract Algebra for Scala | 2025-11-21T04:01:23Z |
| 71 | [TransmogrifAI](https://github.com/salesforce/TransmogrifAI) | 2276 | 399 | Scala | 35 | TransmogrifAI (pronounced trăns-mŏgˈrə-fī) is an AutoML library for building modular, reusable, strongly typed machine learning workflows on Apache Spark with minimal hand-tuning | 2026-06-02T18:03:07Z |
| 72 | [finatra](https://github.com/twitter/finatra) | 2273 | 403 | Scala | 16 | Fast, testable, Scala services built on TwitterServer and Finagle | 2025-08-18T21:11:27Z |
| 73 | [gizzard](https://github.com/twitter-archive/gizzard) | 2245 | 206 | Scala | 0 | [Archived] A flexible sharding framework for creating eventually-consistent distributed datastores | 2017-03-16T23:21:54Z |
| 74 | [riscv-boom](https://github.com/riscv-boom/riscv-boom) | 2241 | 530 | Scala | 154 | SonicBOOM: The Berkeley Out-of-Order Machine | 2026-09-11T18:58:35Z |
| 75 | [cats-effect](https://github.com/typelevel/cats-effect) | 2237 | 577 | Scala | 198 | The pure asynchronous runtime for Scala | 2026-09-18T20:17:15Z |
| 76 | [doobie](https://github.com/typelevel/doobie) | 2225 | 379 | Scala | 127 | Functional JDBC layer for Scala. | 2026-09-19T08:29:48Z |
| 77 | [s3_website](https://github.com/laurilehmijoki/s3_website) | 2215 | 175 | Scala | 70 | Manage an S3 website: sync, deliver via CloudFront, benefit from advanced S3 website features. | 2023-03-23T05:42:25Z |
| 78 | [zio-quill](https://github.com/zio/zio-quill) | 2166 | 352 | Scala | 291 | Compile-time Language Integrated Queries for Scala | 2026-09-05T00:25:09Z |
| 79 | [coursier](https://github.com/coursier/coursier) | 2137 | 334 | Scala | 384 | Pure Scala Artifact Fetching | 2026-09-21T09:39:35Z |
| 80 | [summingbird](https://github.com/twitter/summingbird) | 2122 | 256 | Scala | 148 | Streaming MapReduce with Scalding and Storm | 2022-01-19T17:31:02Z |
| 81 | [scaloid](https://github.com/pocorall/scaloid) | 2088 | 157 | Scala | 17 | Scaloid makes your Android code easy to understand and maintain. | 2026-08-20T07:32:39Z |
| 82 | [SpinalHDL](https://github.com/SpinalHDL/SpinalHDL) | 2041 | 391 | Scala | 133 | Scala based HDL | 2026-09-19T19:03:19Z |
| 83 | [textteaser](https://github.com/MojoJolo/textteaser) | 1964 | 247 | Scala | 6 | TextTeaser is an automatic summarization algorithm. | 2018-02-07T06:42:57Z |
| 84 | [scalacheck](https://github.com/typelevel/scalacheck) | 1964 | 393 | Scala | 56 | Property-based testing for Scala | 2026-09-14T12:34:21Z |
| 85 | [sangria](https://github.com/sangria-graphql/sangria) | 1960 | 219 | Scala | 51 | Scala GraphQL implementation | 2026-09-17T08:30:09Z |
| 86 | [cassandra-spark-connector](https://github.com/apache/cassandra-spark-connector) | 1957 | 929 | Scala | 0 | Apache Spark to Apache Cassandra connector | 2025-04-29T09:28:59Z |
| 87 | [feathr](https://github.com/feathr-ai/feathr) | 1941 | 247 | Scala | 140 | Feathr – A scalable, unified data and AI engineering platform for enterprise | 2024-04-04T19:17:41Z |
| 88 | [monix](https://github.com/monix/monix) | 1929 | 243 | Scala | 86 | Asynchronous, Reactive Programming for Scala and Scala.js. | 2026-09-21T09:19:18Z |
| 89 | [byzer-lang](https://github.com/byzer-org/byzer-lang) | 1835 | 537 | Scala | 113 | Byzer (former MLSQL): A low-code open-source programming language for data pipeline, analytics and AI. | 2024-05-29T08:24:09Z |
| 90 | [spire](https://github.com/typelevel/spire) | 1772 | 239 | Scala | 133 | Powerful new number types and numeric abstractions for Scala. | 2026-07-27T16:55:37Z |
| 91 | [graphcool-framework](https://github.com/Graphcool/graphcool-framework) | 1754 | 125 | Scala | 498 | None | 2020-09-04T16:57:58Z |
| 92 | [giter8](https://github.com/foundweekends/giter8) | 1751 | 225 | Scala | 48 | a command line tool to apply templates defined on GitHub  | 2026-09-12T23:33:16Z |
| 93 | [OpenComputers](https://github.com/MightyPirates/OpenComputers) | 1741 | 509 | Scala | 131 | Home of the OpenComputers mod for Minecraft. | 2026-08-04T16:07:14Z |
| 94 | [OBP-API](https://github.com/OpenBankProject/OBP-API) | 1737 | 482 | Scala | 197 | An open source RESTful API platform for banks that supports Open Banking, XS2A, PSD2 and Open Finance through access to accounts, transactions, counterparties, payments, entitlements and metadata - plus a host of internal banking and management APIs. | 2026-09-21T18:49:32Z |
| 95 | [refined](https://github.com/fthomas/refined) | 1733 | 152 | Scala | 63 | Refinement types for Scala | 2026-09-21T05:55:53Z |
| 96 | [Monocle](https://github.com/optics-dev/Monocle) | 1699 | 207 | Scala | 51 | Optics library for Scala | 2026-09-05T06:54:51Z |
| 97 | [skunk](https://github.com/typelevel/skunk) | 1667 | 175 | Scala | 75 | A data access library for Scala + Postgres. | 2026-09-19T08:21:54Z |
| 98 | [scalajs-react](https://github.com/japgolly/scalajs-react) | 1659 | 230 | Scala | 14 | Facebook's React on Scala.JS | 2026-07-13T06:23:38Z |
| 99 | [pekko](https://github.com/apache/pekko) | 1641 | 211 | Scala | 126 | Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala | 2026-09-21T13:43:38Z |
| 100 | [elastic4s](https://github.com/Philippus/elastic4s) | 1639 | 685 | Scala | 6 | 🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client | 2026-09-13T06:55:11Z |