typelead/eta
The Eta Programming Language, a dialect of Haskell on the JVM observed · 2026-08-28
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 3800
- days_rel: n/a
- days_push: 1494
- n_releases_24m: 0
Adoption not part of the score
2634 stars · 142 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Eta is a dialect of Haskell that compiles to and runs on the JVM, forked from GHC 7.10.3 with strong Java interoperability via a typed FFI. It ships with the Etlas build tool, Gradle/sbt plugins, and a REPL, and supports concurrency features like STM, MVars, and fibers.
Use cases
- run haskell on the jvm
- write functional code that interoperates with java
- build concurrent and distributed services with stm
- use hackage libraries in a jvm project
- add haskell to a mixed-language gradle or scala project
- learn functional programming with strong type inference
When to choose
- you want Haskell semantics but must deploy on the JVM
- you need typed interop with Java, Scala, or Clojure codebases
- you want GHC-style type safety with JVM tooling
When to avoid
- you need GHC 8+ features or current Hackage compatibility
- you need an actively maintained language with recent releases
- you want non-JVM targets like native binaries or .NET
Facets
cli-tool · maturity maintenance
compiler programming-language interpreter build-tool programming-languages compilers jvm cross-platform cli haskell eta jvm-languages functional-programming java-interop etlas ghc-fork stm jvm docker
10 sources
- readme: https://github.com/typelead/eta · fetched 2026-08-28 · 9618e2b2c89d
- homepage: https://eta-lang.org · fetched 2026-08-29 · df53a229b3e2
- site_page: https://eta-lang.org/docs · fetched 2026-08-29 · 5269027acae6
- site_page: https://eta-lang.org/docs/user-guides · fetched 2026-08-29 · a1f05b43d5fa
- site_page: https://eta-lang.org/docs/tutorials · fetched 2026-08-29 · 20610d65ffb7
- site_page: https://eta-lang.org/docs/cheatsheets · fetched 2026-08-29 · 210883fc90af
- site_page: https://eta-lang.org/docs/faq · fetched 2026-08-29 · 24b68702aca9
- site_page: https://eta-lang.org/docs/user-guides/eta-user-guide/installation/methods · fetched 2026-08-29 · bc5a95d2a942
- site_page: https://eta-lang.org/docs/user-guides/eta-user-guide/introduction/what-is-eta · fetched 2026-08-29 · 6bf96f4185bf
- site_page: https://eta-lang.org/docs/tutorials/web-services/overview · fetched 2026-08-29 · 054e1f720514
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| typelead/eta | main | 23 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem