TUI Libraries Catalog

A breadth-first survey of terminal user interface (TUI) libraries across programming languages. This catalog covers rendering models, architecture patterns, and abstraction levels to inform the design of TUI capabilities for Sparkles.

Rust

Library	Rendering Model	Architecture	Abstraction	Status	Links
Ratatui	Immediate	App-driven loop	Mid-level	Active	repo · docs
Cursive	Retained	Callback-based	High-level	Maintained	repo · docs
Crossterm	N/A (backend)	Imperative	Low-level	Active	repo · docs
Termion	N/A (backend)	Imperative	Low-level	Maintained	repo
Termwiz	Immediate	Imperative	Mid-level	Active	repo
Dioxus TUI	Retained	React-like	High-level	Experimental	repo

Python

Library	Rendering Model	Architecture	Abstraction	Status	Links
Textual	Retained	CSS + widgets	High-level	Active	repo · docs
Rich	Immediate	Render-to-console	Mid-level	Active	repo · docs
Urwid	Retained	Widget tree	Mid-level	Maintained	repo · docs
npyscreen	Retained	Form-based	High-level	Unmaintained	repo
prompt_toolkit	Retained	Component-based	Mid-level	Active	repo · docs
curses (stdlib)	Immediate	Imperative	Low-level	Stable	docs

JavaScript / TypeScript

Library	Rendering Model	Architecture	Abstraction	Status	Links
Ink	Retained	React components	High-level	Active	repo
Blessed	Retained	Widget tree	High-level	Unmaintained	repo
Neo-blessed	Retained	Widget tree	High-level	Low activity	repo
Terminal Kit	Hybrid	Imperative + widgets	Mid-level	Maintained	repo
Yoga (layout)	N/A (layout engine)	Flexbox	Low-level	Active	repo

Neovim / Lua

Library	Rendering Model	Architecture	Abstraction	Status	Links
Snacks.nvim	Retained (buffers/windows)	Event-driven plugin suite	High-level	Active	repo · docs

Go

Library	Rendering Model	Architecture	Abstraction	Status	Links
Bubble Tea	Immediate	Elm / MVU	Mid-level	Active	repo
Lip Gloss	N/A (styling)	Builder pattern	Mid-level	Active	repo
Bubbles	Immediate	MVU components	Mid-level	Active	repo
tview	Retained	Widget tree	High-level	Active	repo
gocui	Retained	View-based	Mid-level	Maintained	repo
tcell	N/A (backend)	Imperative	Low-level	Active	repo
Termbox-go	N/A (backend)	Imperative	Low-level	Archived	repo

Haskell

Library	Rendering Model	Architecture	Abstraction	Status	Links
Brick	Retained	Pure functional / declarative	High-level	Active	repo · docs
Vty	Immediate	Imperative	Low-level	Active	repo

C / C++

Library	Rendering Model	Architecture	Abstraction	Status	Links
Notcurses	Retained (planes)	Imperative + planes	Mid-level	Active	repo · docs
ncurses	Immediate	Imperative	Low-level	Stable	docs
FTXUI	Immediate	Functional components	Mid-level	Active	repo
ImTui	Immediate	Dear ImGui for terminal	Mid-level	Maintained	repo
CDK	Retained	Widget-based	High-level	Maintained	docs
Termbox2	N/A (backend)	Imperative	Low-level	Active	repo

D

Library	Rendering Model	Architecture	Abstraction	Status	Links
Scone	Immediate	Imperative	Low-level	Archived	repo
Arsd terminal	Hybrid	Imperative + widgets	Mid-level	Active	repo
Nice	N/A (backend)	Imperative	Low-level	Unmaintained	repo (deleted)

Java / Kotlin

Library	Rendering Model	Architecture	Abstraction	Status	Links
Lanterna	Retained	Widget tree	High-level	Maintained	repo
JLine	N/A (line editing)	Imperative	Low-level	Active	repo
Mosaic	Retained	Compose-like	High-level	Active	repo

Ruby

Library	Rendering Model	Architecture	Abstraction	Status	Links
TTY	Hybrid	Component toolkit	Mid-level	Maintained	repo
Curses (gem)	Immediate	Imperative	Low-level	Maintained	repo

Zig

Library	Rendering Model	Architecture	Abstraction	Status	Links
Tuile	Immediate	Functional	Mid-level	Archived	repo (deleted)
zbox	Immediate	Ratatui-inspired	Mid-level	Archived	repo (deleted)
libvaxis	Immediate	Imperative	Low-level	Active	repo

Nim

Library	Rendering Model	Architecture	Abstraction	Status	Links
Illwill	Immediate	Imperative	Low-level	Maintained	repo
nimbox	Immediate	Termbox binding	Low-level	Unmaintained	repo

OCaml

Library	Rendering Model	Architecture	Abstraction	Status	Links
Nottui	Retained	Functional reactive	Mid-level	Maintained	repo
Lambda-term	Retained	Widget tree	Mid-level	Maintained	repo

Clojure

Library	Rendering Model	Architecture	Abstraction	Status	Links
Clansi	N/A (styling)	Functional	Low-level	Maintained	repo
clojure-lanterna	Retained	Wrapper	Mid-level	Unmaintained	repo

Scala

Library	Rendering Model	Architecture	Abstraction	Status	Links
Fansi	N/A (styling)	Functional	Low-level	Maintained	repo

---

Architectural Taxonomy

By Rendering Model

Model	Description	Libraries
Immediate	Application redraws entire UI each frame; framework diffs or flushes	Ratatui, FTXUI, ImTui, Bubble Tea, ncurses
Retained	Framework maintains widget tree; updates propagate automatically	Textual, Brick, Blessed, Ink, Cursive, tview, Lanterna, Notcurses (planes)
Hybrid	Mix of retained state with explicit render calls	Terminal Kit, arsd terminal, TTY

By Architecture Pattern

Pattern	Description	Libraries
Elm / MVU	Model-View-Update loop with messages	Bubble Tea, Brick (partially)
React / Component	Declarative components with props, reconciliation	Ink, Dioxus TUI, Mosaic
Pure Functional	Immutable state, declarative combinators	Brick, Nottui
Widget Tree	Mutable tree of widget objects	Textual, Cursive, tview, Urwid, Lanterna, Blessed
Imperative	Direct terminal manipulation	ncurses, Crossterm, tcell, Termbox
Functional Components	Stateless functions returning UI trees	FTXUI

By Layout Approach

Approach	Description	Libraries
CSS / Flexbox	Web-inspired box model and flex layout	Textual (CSS subset), Ink (Yoga/flexbox)
Constraint-based	Size constraints flow through widget tree	Ratatui, Brick, tview
Combinators	Compositional layout via functional combinators	Brick (hBox, vBox, padded)
Manual / Absolute	Explicit coordinates and sizes	ncurses, Notcurses (planes), Termbox
Declarative Splits	Layout DSL with percentage/fixed splits	Ratatui (Layout::default().constraints([...]))

---

Detailed Studies

The following libraries are analyzed in depth:

• Ratatui — Rust immediate-mode TUI with constraint-based layout
• Ink — React for the terminal (JavaScript)
• Textual — CSS-styled retained-mode framework (Python)
• Bubble Tea — Elm Architecture for terminals (Go)
• Brick — Pure functional declarative TUI (Haskell)
• Notcurses — Modern ncurses successor (C)
• FTXUI — Functional DOM-like components with flexbox layout (C++)
• Cursive — Retained-mode callback-based view hierarchy (Rust)
• Mosaic — Jetpack Compose runtime for terminals (Kotlin)
• Nottui — Incremental computation / functional reactive TUI (OCaml)
• libvaxis — comptime-powered, allocator-aware terminal library (Zig)
• tview — Retained widget tree with flex layout (Go)
• ImTui — Dear ImGui paradigm adapted for terminals (C++)
• Snacks.nvim — Neovim UI toolkit built on floating windows and layouts

Comparative & Specialized Studies

See the Comparison for cross-library synthesis and design recommendations for Sparkles.

See the Tree-View Case Study for a focused analysis of tree-view implementations across 13 libraries, including detailed studies of snacks.nvim, ratatui, Textual, Rich (Python), broot, cursive_tree_view (Rust), and stlab::forest (C++).

References