Rio

Text editor & development environment

Back to the future.

A lightweight IDE in the spirit of ’90s desktop software.

Screenshots

Select an image for full size. macOS · Linux

macOS

29 September 2026, before the font-size and dark-control fixes.

rio GUI: macOS: split editor, file tree, search, and agent pane
macOS: split editor, file tree, search, and agent pane
rio GUI: macOS: Preferences with native window controls, radio buttons, and checkboxes
macOS: Preferences with native window controls, radio buttons, and checkboxes
rio GUI: macOS: comparison view and project replace
macOS: comparison view and project replace

Linux

rio GUI: Editor with all panes
1Editor with all panes
rio GUI: Single file
2Single file
rio GUI: Agent edit review
3Agent edit review
rio GUI: Agent plan mode
4Agent plan mode
rio GUI: Git staging and split editor
5Git staging and split editor
rio GUI: Compare view and regex replace
6Compare view and regex replace
rio GUI: Agent command approval
7Agent command approval
rio GUI: Manual and markdown source
8Manual and markdown source
rio GUI: Preferences
9Preferences
rio GUI: Signed extension install
10Signed extension install
rio GUI: Vi mode and multi line tabs
11Vi mode and multi line tabs
rio GUI: Rearranged docks
12Rearranged docks
rio GUI: Solarized dark
13Solarized dark
rio GUI: Solarized light
14Solarized light
rio GUI: Acme
15Acme
rio GUI: Night theme
16Night theme