Life & fun · alternatives · 2026

24 alternatives to Legion, an as-simple-as-possible blockchain server written in Haskell

Simple blockchain server written in Haskell for educational purposes - aviaviavi/legion

Legion is a blockchain server built with Haskell, designed to be as simple as possible. It is for developers interested in blockchain technology who prefer a minimal implementation. The project was released in 2017 and… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Legion, an as-simple-as-possible blockchain server written in Haskell launched in 2017; newer entries below may have overtaken it.

1. 1
   Haskell library for pricing and information on crypto-currencies▲86

   Haskell wrapper for the CryptoCompare API - No longer maintained, ping me if you'd like to take over - aviaviavi/cryptocompare

   2017 · github.com · its alternatives →

2. 2
   Horizon 1.0▲312

   Realtime, open-source backend for JavaScript apps

   2016 · sequence.xyz · its alternatives →

3. 3
   I finished v5 of a JVM framework I've spent spent half a decade making▲377

   ForewordJavalin is a Java and Kotlin web framework which focuses on simplicity and Java/Kotlin interoperability.It supports WebSockets and HTTP3, and it uses...

   2022 · javalin.io · its alternatives →

4. 4
   An open-source financial ledger API written in Clojure▲125

   Immutable, scalable, and easy to use ledger service. - hoophq/sequence

   2020 · github.com · its alternatives →

5. 5
   Toy Haskell blockchain with variable hash functions for ASIC resistance▲15

   Maximally decentralized cryptocurrency. Contribute to PaulGustafson/dcc development by creating an account on GitHub.

   2020 · github.com · its alternatives →

6. 6SH
   Simplexhc – Haskell to LLVM compiler (design phase)▲55

   2017 · pixel-druid.com · its alternatives →

7. 7RB
   RESTful Bitcoin payment channel server (written in Haskell)▲13

   GitHub repo: https://github.com/runeksvendsen/restful-payment-channel-server Hello everyone This server allows the operator to receive instant Bitcoin payments (no waiting for confirmations) from a single, pre-defined sender; paying the Bitcoin transaction fee only once, when the channel is closed. One could imagine, for example, setting up a service which sends video in response to payments, the first minute being free (if you have an open payment channel), and then charging, say 0.1 cent per second thereafter. That's trustless pay-per-view. Pretty cool, if you ask me.…

   2016 · its alternatives →

8. 8SI
   Subth.ink – write something and see how many others wrote the same▲92

   Hey HN, this is a small Haskell learning project that I wanted to share. It's just a website where you can see how many people write the exact same text as you (thought it was a fun idea). It's built using Scotty, SQLite, Redis and Caddy. Currently it's running in a small DigitalOcean droplet (1 Gb RAM). Using Haskell for web development (specifically with Scotty) was slightly easier than I thought, but still a relatively hard task compared to other languages. One of my main friction points was Haskell's multiple string-like types: String, Text (& lazy), ByteString (& lazy), and each library…

   Jan 2026 · subth.ink · its alternatives →

9. 9
   A small virtual machine written in C▲212

   "interesting" VM in C. Let's see how this goes. Contribute to tekknolagi/carp development by creating an account on GitHub.

   2014 · github.com · its alternatives →

10. 10
    Maki▲84

    An efficient AI coding agent. Native Rust TUI. Immediate startup, 60 FPS, low memory. Indexes files instead of reading them, chains tools in a sandbox interpreter. Anthropic, OpenAI, Google, Z.AI, OpenRouter, Synthetic, or any OpenAI / Anthropic compatible API.

    2022 · maki.sh · its alternatives →

11. 11
    Codec-beam – Generate Erlang VM byte code from Haskell▲53

    Generate Erlang VM byte code from Haskell. Contribute to kofigumbs/codec-beam development by creating an account on GitHub.

    2018 · github.com · its alternatives →

12. 12
    Whirlwind – Async concurrent hashmap for Rust▲140

    Hey HN, this is Will and David from Fortress (https://news.ycombinator.com/item?id=41426998). We use a lot of async Rust internally, and created this library out of a need for an async-aware concurrent hashmap since there weren’t many available in the Rust ecosystem. Whirlwind is a sharded HashMap with a fully asynchronous API. Just as dashmap is a replacement for std::sync::RwLock, whirlwind aims to be a replacement for tokio::sync::RwLock. It has a similar design and performance characteristics to dashmap, but seems to perform better in read-heavy workloads with tokio's…

    2024 · github.com · its alternatives →

13. 13
    I built a poker site with Haskell▲157

    🂺 A Multiplayer Poker App Crafted with Haskell and React - therewillbecode/poker-maison

    2019 · github.com · its alternatives →

14. 14
    A hash array-mapped trie implementation in C▲171

    Long-simmering side project that is finally ready to see the light. HAMTs are a cool persistent data structure and implementing one has been a lot of fun. Beyond the code, there is likely some value in the extensive and largely complete implementation docs; basic benchmarks are linked in the README, too. Kind of aiming to be "the libavl for HAMTs". That is obviously a high and aspirational bar but a distinct possibility if it stirs up a little interest and/or contribution. Anyways, it's time for this to go out, collect feedback and maybe even some use outside of toy projects. Let me…

    2023 · github.com · its alternatives →

15. 15
    Trivial▲107

    Google for Ethereum Blockchain

    2018 · trivial.co · its alternatives →

16. 16
    Online Haskell REPL▲82

    We heard your requests for Haskell and today we're excited to finally announce Haskell as yet another language we support. We've decided to put our focus...

    2017 · repl.it · its alternatives →

17. 17
    Ion, a Rust/Tokio powered JavaScript runtime for embedders▲30

    A Positively Charged JavaScript Runtime . Contribute to alshdavid-public/ion development by creating an account on GitHub.

    2025 · github.com · its alternatives →

18. 18
    Retrocomputing with Clash: Haskell for FPGA Hardware Design▲80

    Haskell for FPGA Hardware Design: Use abstractions like monads and lenses to implement 1970

    2021 · unsafeperform.io · its alternatives →

19. 19
    Condor – A library for building scalable TCP servers in Erlang▲65

    A minimal library for building scalable TCP servers in Erlang - sinasamavati/condor

    2018 · github.com · its alternatives →

20. 20
    Dumbest AI + Blockchain Project in 100 lines▲52

    the purest AI + Blockchian project. Contribute to theDumbAssCoin/DUMBASS development by creating an account on GitHub.

    2019 · github.com · its alternatives →

21. 21
    Maybe Haskell▲60

    See what it’s like to program in a language without null.

    2015 · books.thoughtbot.com · its alternatives →

22. 22
    A threaded, TCP, key value store in Haskell▲63

    A multi-threaded, TCP, key-value store inspired by Redis implemented in Haskell. - honza/redish

    2013 · github.com · its alternatives →

23. 23SA
    Servant – A Haskell web framework with type-level API DSL▲55

    2015 · haskell-servant.github.io · its alternatives →

24. 24
    A minimal stack based VM in C▲60

    A minimal stack-based VM. Contribute to codr7/liblg development by creating an account on GitHub.

    2020 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →