Skip to content

The com-lihaoyi Scala Platform 🇸🇬

The com-lihaoyi platform lets you write Scala in an easy and productive way while delivering real business value. It provides all the core building blocks a typical software engineer needs day to day: HTTP clients and servers, JSON/binary data serialization, filesystem operations, CLI argument parsing, build tooling, etc. These can be combined in a variety of ways to perform many useful real-world tasks:

The com-lihaoyi organization maintains an ongoing issue bounty program, paying out 100s to 1000s of USD for the completion of various issues. See the up-to-date listing here:

The com-lihaoyi projects are all open source, but if you want to learn more about writing Scala in the easy and productive way, you check out the following book:

Hands-on Scala Programming also comes with over 150 worked examples that demonstrate how to use Scala with the com-lihaoyi projects in a wide variety of real scenarios:

These examples are free to browse online, and are a great way to kickstart your next application, project or business using the Scala programming language.

Pinned Loading

  1. cask cask Public

    Cask: a Scala HTTP micro-framework. Cask makes it easy to set up a website, backend server, or REST API using Scala

    Scala 565 64

  2. scalasql scalasql Public

    Scala ORM to query SQL databases from Scala via concise, type-safe, and familiar case classes and collection operations. Connects to Postgres, MySql, H2, and Sqlite out of the box

    Scala 230 31

  3. Ammonite Ammonite Public

    Scala Scripting

    Scala 2.6k 371

  4. mill mill Public

    Mill is a better build tool for Java, Scala and Kotlin: 3-6x faster than Maven or Gradle, less fiddling with plugins, and more easily explorable in your IDE

    Scala 2.5k 407

  5. mainargs mainargs Public

    A small, convenient, dependency-free library for command-line argument parsing in Scala

    Scala 202 26

  6. requests-scala requests-scala Public

    A Scala port of the popular Python Requests HTTP client: flexible, intuitive, and straightforward to use.

    Scala 735 88

Repositories

Showing 10 of 23 repositories
  • scalasql Public

    Scala ORM to query SQL databases from Scala via concise, type-safe, and familiar case classes and collection operations. Connects to Postgres, MySql, H2, and Sqlite out of the box

    com-lihaoyi/scalasql’s past year of commit activity
    Scala 230 31 13 4 Updated Jul 19, 2025
  • mill Public

    Mill is a better build tool for Java, Scala and Kotlin: 3-6x faster than Maven or Gradle, less fiddling with plugins, and more easily explorable in your IDE

    com-lihaoyi/mill’s past year of commit activity
    Scala 2,509 MIT 407 156 38 Updated Jul 19, 2025
  • unroll Public
    com-lihaoyi/unroll’s past year of commit activity
    Scala 32 4 4 0 Updated Jul 14, 2025
  • upickle Public

    uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala

    com-lihaoyi/upickle’s past year of commit activity
    Scala 747 MIT 171 16 14 Updated Jul 13, 2025
  • os-lib Public

    OS-Lib is a simple, flexible, high-performance Scala interface to common OS filesystem and subprocess APIs

    com-lihaoyi/os-lib’s past year of commit activity
    Scala 721 80 16 17 Updated Jul 11, 2025
  • PPrint Public

    Pretty-printing value, types and type-signatures in Scala

    com-lihaoyi/PPrint’s past year of commit activity
    Scala 241 MIT 41 14 20 Updated Jul 11, 2025
  • utest Public

    A simple testing framework for Scala

    com-lihaoyi/utest’s past year of commit activity
    Scala 497 MIT 88 29 8 Updated Jul 11, 2025
  • cask Public

    Cask: a Scala HTTP micro-framework. Cask makes it easy to set up a website, backend server, or REST API using Scala

    com-lihaoyi/cask’s past year of commit activity
    Scala 565 64 6 4 Updated Jul 11, 2025
  • geny Public

    Provides the geny.Generator data type, the dual to a scala.Iterator that can ensure resource cleanup

    com-lihaoyi/geny’s past year of commit activity
    Scala 96 25 1 14 Updated Jul 11, 2025
  • fansi Public

    Scala/Scala.js library for manipulating Fancy Ansi colored strings

    com-lihaoyi/fansi’s past year of commit activity
    Scala 231 26 9 16 Updated Jul 11, 2025