Mosugo is a minimal, spatial notes application built for Windows with Go and Fyne. It combines the infinite creative freedom of a zoomable canvas with the structured simplicity of daily workspaces.
Create cards, draw freehand strokes, and organize your thoughts in an infinite space with everything automatically saved per day.
- Infinite Zoomable Canvas: Pan and zoom across an unlimited dotted grid workspace
- Four Tool Modes: Select, Card, Draw, and Erase (switch via numpad 1-4)
- Card System: Create draggable note cards with markdown-like checkbox syntax
[x]and[] - Freehand Drawing: Smooth drawing with automatic stroke simplification (Douglas-Peucker algorithm)
- Daily Workspaces: Each day gets its own workspace file with automatic persistence
- Calendar Navigation: Quickly jump between dates to review past workspaces
- Auto-save: Changes are automatically saved after 2 seconds of inactivity
- Custom Theme: Beautiful color palette with Comic Sans font for a friendly feel
Download the latest Mosugo.exe directly from the official website: mosugo.dibby.me
Alternatively, you can find it on the GitHub Releases page.
Requirements:
- Go 1.23 or later
- Windows
- C compiler (gcc/mingw64 for Windows)
Steps:
# Clone the repository
git clone https://github.com/F4tal1t/Mosugo.git
cd Mosugo
# Build the executable
go build -o mosugo.exe cmd/mosugo/main.go
# Or use Fyne packaging for a bundled executable
go install fyne.io/fyne/v2/cmd/fyne@latest
fyne package -os windows
# Run
./mosugo.exe| Key | Action |
|---|---|
| Numpad 0 | Select Tool (move and select cards) |
| Numpad 1 | Card Tool (create new cards) |
| Numpad 2 | Draw Tool (freehand drawing) |
| Numpad 3 | Erase Tool (remove cards/strokes) |
- Pan: Hold middle mouse button and drag (or use right-click in Select mode)
- Zoom: Scroll mouse wheel
- Select Tool: Click cards to select, drag to move
- Card Tool: Drag to create a new card, type to edit
- Draw Tool: Click and drag to draw
- Erase Tool: Hover over strokes to remove them
Cards support simple markdown-like checkboxes:
[ ]renders as an unchecked box: ☐[x]renders as a checked box: ☑
Example:
Shopping List
[ ] Milk
[x] Eggs
[ ] Bread
Click the date indicator at the bottom of the screen to open the calendar. Navigate between months and select any date to load that day's workspace.
Workspaces are saved as JSON files in:
- Windows:
%APPDATA%\Roaming\Mosugo\ - Linux:
~/.config/Mosugo/
Each file is named YYYY-MM-DD.mosugo (e.g., 2026-02-20.mosugo).
Files contain:
- All cards (content, position, size, color)
- All drawing strokes
- Canvas view state (zoom level, pan offset)
You can back up or transfer your data by copying these files.
Mosugo/
├── cmd/
│ └── mosugo/ # Main application entry point
├── internal/
│ ├── canvas/ # Infinite canvas and coordinate transforms
│ ├── cards/ # Card widget implementation
│ ├── storage/ # Workspace persistence layer
│ ├── theme/ # Custom Fyne theme
│ ├── tools/ # Tool state machine (Select/Card/Draw/Erase)
│ └── ui/ # Calendar and metaball border UI
├── assets/ # Icons, fonts, resources (embedded at build)
├── go.mod # Go module definition
└── Mosugo.toml # Fyne packaging configuration
# Run in development mode
go run cmd/mosugo/main.go
# Build for production
go build -o mosugo.exe cmd/mosugo/main.go
# Package with Fyne (includes icon and metadata)
fyne package -os windows# Run all tests
go test ./...
# Run tests with coverage
go test -cover ./...# Install golangci-lint
go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
# Run linters
golangci-lint runContributions are welcome! Please read CONTRIBUTING.md for guidelines on:
- Setting up your development environment
- Code style and standards
- Submitting pull requests
- Finding good first issues
Mosugo is licensed under the MIT License.
Copyright © 2026 Dibyendu Sahoo
- Built with Fyne UI framework
- Inspired by Forma and Tweek
- Uses Douglas-Peucker algorithm for stroke simplification
- Metaball borders powered by Signed Distance Fields
- Issues: Report bugs or request features via GitHub Issues
Made with Pain by Dibyendu Sahoo