App: Iconology
Developer: Liam Rosenfeld
Genres: Developer Tools, Graphics & Design

Easily import, modify, and export icons—all 100% free and open source.

Features
- Exports
  - Xcode (Generates JSON for dragging folder right into Xcode)
    - iOS
    - MacOS
    - Message
    - Apple Watch
  - Special Files
    - .icns
    - .ico
  - Image Sets
    - Mac Iconset
    - Favicons
  - PNGs of any size
  - Create Your Own Custom Presets!
- Image Editor
  - Background Color
  - Scale
  - Horizontal and Vertical Shift
  - Non-Stretching Aspect Ratio Editor
  - Rounding (Circular, Continuous, and Squircle Modes)
  - Drop Shadows
  - Padding
  - Create macOS Icons in One Click!
- Supports
  - .png
  - .jpg
  - .ai
  - .psd
  - .pdf
  - raw
  - and many more!

All in a lightweight and simple UI that is 100% native for macOS

Release notes:
Major 2.0 Release!

The interface has been rewritten and image editing has been vastly improved

Every interface has been redesigned to match the current macOS design language and improve usability
- Editor view rearranged to position items in a more natural order
- Image adjustments reworked to fit more settings while feeling less cramped
- Custom preset editing redesigned to match the new Big Sur style
- Selecting a preset now automatically applies default adjustments (makes macOS generation even more convenient)
- Drag a new image onto the editor to replace the current one
- Support for multiple editor windows at once
- Unified preset selector
- Shift slider now matches the aspect ratio
- Prefix is now set in the save panel
- Improved accessibility
- Now uses SwiftUI (for reactivity, resizing, and improved development speed)

Image generation has new capabilities and improved performance 
- Continuous curvature (macOS style) and squircle rounding styles (these were quite a journey to implement... you can read about it on my blog)
- Drop shadows
- Gradient backgrounds
- Selecting color spaces
- PNG export size is now set manually instead of the original image size
- Image sizing now uses a more logical system. Instead of being set by the input image, it is set by the selected preset. This makes the preview genuinely reflective of what the output will be.
- Control over color spaces
- The generation pipeline has been reworked to improve consistency and performance

Because of all of the interface features, Iconology now requires macOS Ventura. If this is an issue, you can still use an old version from GitHub.

I created the initial version of Iconology exactly five years ago to use as a tool in my workflow. I hope this update improves its usefulness in your workflow as well.