Haskell Functional

Open-source Haskell projects categorized as Functional
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Top 5 Haskell Functional Projects

Functional

  1. Carp

    A statically typed lisp, without a GC, for real-time applications.

    Project mention: Jank Programming Language | news.ycombinator.com | 2025-07-06

    Rich has many great ideas and he founded Clojure. I respect him deeply. On typing, however, we do not agree entirely.

    For a practical example of a Clojure-like language with a completely static type system (with affine typing), see Carp. https://github.com/carp-lang/Carp

    I don't see why there can't be a Carp mode in jank, with bridges in place to connect the Clojurey world from the Carpy world. This would allow jank users to develop interactively to start with, figure out their shapes, use the REPL, etc. Then, if they want, they can lock down some parts of the code for both performance and correctness gains.

  2. InfluxDB

    InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

    InfluxDB logo

  3. reroute

    Another Haskell web framework for rapid development (by agrafix)

  4. salt

    The compilation target that functional programmers always wanted. (by discus-lang)

  5. fn

    A functional web framework (by positiondev)

  6. foop.hs

    Object Oriented Programming implemented in Functional Paradigm

  7. Stream

    Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.

    Stream logo
NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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  • Pen: The programming language for scalable development

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  • Spock web framework routing question

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Index

What are some of the best open-source Functional projects in Haskell? This list will help you:

# Project Stars
1 Carp 5,687
2 reroute 679
3 salt 62
4 fn 34
5 foop.hs 3

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InfluxDB – Built for High-Performance Time Series Workloads
InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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