A suite of fast, opinionated terminal tools written in Rust. Single static binaries. Shared TUI foundation (crust). No runtime dependencies.

Landing page: isene.github.io/fe2o3

Tool	Release	Role	Ruby equivalent
rush		Interactive shell	rsh
pointer		File manager	RTFM
kastrup		Messaging hub (email, RSS, chat)	Heathrow
scribe		Modal text editor for writers	—
scroll		Web browser	brrowser
gazette		Daily news digest reader	—
tock		Calendar with ephemeris	Timely
astro		Astronomy panel + telescope/eyepiece catalog	astropanel + telescope-term
watchit		Movie / series browser	IMDB-terminal
torii		Captive-portal listener (NetworkManager → Firefox)	—
crush		Configuration TUI for rush	—
prism		TUI color picker (FG/BG slots, RGB+HSV, WCAG contrast)	—
drain		Battery-drain triage TUI (top wakers, per-WS attribution)	—
amar		Amar RPG companion (NPC / encounter / town / weather forge, campaign tracker, lore, AI inspire)	Amar-Tools
tune		Spotify Connect controller (search, library, queue, devices, transport)	—
library		Generative personal library (curate a shelf of books that should exist, then have them written on demand)	—

nova and scope have been merged into astro and are archived. hyper has been folded into scribe — .hl editing now lives there with full hyperlist.vim parity. All three READMEs link to their replacements.

Crate	Release	Role	Ruby equivalent
crust		TUI foundation (panes, colors, input)	rcurses
glow		Inline images (kitty / sixel / w3m / braille)	termpix
highlight		Theme-aware syntax highlighter (~18 source langs + HL / Markdown / LaTeX / email)	—
orbit		Moon phases, ephemeris, sun / planet positions	ephemeris
plot		Terminal charts (sparkline / line / candle / bar) with Unicode + ANSI	termchart

The mobile half of the family. nomad is a single Android monorepo — a shared Rust core (the same logic as the desktop, via UniFFI) under thin Kotlin / Compose shells. Each app carries one Fe₂O₃ workflow off the laptop and syncs its data over Syncthing — no Google account, no cloud middleman.

# Linux x86_64 — one-liner to grab every Fe₂O₃ binary
for app in rush pointer kastrup scribe scroll gazette tock astro watchit torii crush prism drain amar tune library; do
  curl -L "https://github.com/isene/$app/releases/latest/download/$app-linux-x86_64" \
    -o ~/bin/$app && chmod +x ~/bin/$app
done

# Other platforms: replace -linux-x86_64 with:
#   -linux-aarch64   (Raspberry Pi, ARM64 Linux)
#   -macos-x86_64    (Intel Mac)
#   -macos-aarch64   (Apple Silicon)

Rust the language was actually named after a family of fungi (Pucciniales, plant pathogens "over-engineered for survival" per Graydon Hoare). The iron-oxide association came later, through the visual rhyme with what those fungi look like on a leaf. Fe₂O₃ is that iron oxide: what happens when iron meets oxygen meets time. This is the terminal-facing half of that toolkit.

Every tool is a feature port of a long-running Ruby original, rewritten for speed, single-binary distribution, and async-first UI behavior.

All tools in the suite are public domain (Unlicense). Borrow or steal whatever you want.

— Geir Isene