fabulous-dev/Fabulous
Declarative UI framework for cross-platform mobile & desktop apps, using MVU and F# functional programming observed · 2026-09-03
Health v2 · maintenance only
88/100
- Activity 100
- Release rhythm 67
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 3131
- days_rel: 9
- days_push: 0
- n_releases_24m: 1
Adoption not part of the score
1270 stars · 120 forks observed · 2026-09-03
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Fabulous is a declarative UI framework for .NET that lets developers build cross-platform mobile and desktop applications in F# using the Model-View-Update (MVU) architecture. It supplies the application core, state handling, and declarative DSL, while rendering through pluggable backends such as .NET MAUI (Fabulous.MauiControls) and Avalonia (Fabulous.Avalonia).
Use cases
- build cross-platform mobile apps with F#
- declarative UI framework for .NET desktop applications
- MVU / Elm-architecture state management for apps
- single codebase for iOS, Android, macOS and Windows
- testable application logic with pure update functions
- functional programming alternative to Xamarin/MAUI XAML
When to choose
- Your team knows F# and prefers a functional, declarative programming model for app development
- You want MVU-style explicit state transitions that make update logic easy to reason about and unit test
- You are already in the .NET ecosystem and want one declarative codebase across mobile and desktop via MAUI or Avalonia
When to avoid
- Your team works primarily in C# or other .NET languages rather than F#
- You need extensive third-party native control libraries or heavy platform-specific UI customization beyond what the MAUI/Avalonia bindings expose
- You require commercial vendor support; Fabulous is a community-built, sponsorship-funded project
Facets
framework · maturity active
mobile-framework desktop-framework state-management ui-components mobile-development desktop-applications cross-platform frontend cross-platform windows dotnet mvu elm-architecture fsharp declarative-ui dotnet maui avalonia functional-programming mobile desktop android ios macos
2 sources
- readme: https://github.com/fabulous-dev/Fabulous · fetched 2026-09-03 · 975c9120a093
- homepage: https://fabulous-dev.github.io/Fabulous/ · fetched 2026-08-29 · 2709af35addd
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| fabulous-dev/Fabulous | main | 88 |
For agents
markdown · JSON · MCP: product_card(name="fabulous-dev/Fabulous")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem