PhotoQt

ApolloOne is a powerful image viewer and manager designed for seasoned amateurs and professional photographers. The design objectives are ease of use and speed and lots of it. Arguably the fastest image viewer ever created for the macOS, it works with your existing folder structure without ever needing to import files into a database. It offers a comprehensive set of tools for photographers, smart memory card imports, displaying camera AF points, rating and culling images, managing metadata, searching and filtering, batch renaming, and much more. Easy to use interface with unique HUD display, maximizes image display area, especially on a Macbook. Browsing history for quickly switching between multiple events or projects. Rotate, mirror, and flip photos and videos instantly. Correct orientation of JPEGs without altering image data. EXIF metadata inspector with search and edit features. Add tags to your favorite list for quick filtering.

True full-screen viewer with photo zoom support. Customizable image magnifier. Powerful image editing tools. Resize/resample, rotate/flip, crop, sharpen/blur, adjust lighting/colors/curves/levels, etc. Eleven re-sampling algorithms to choose from when resizing images. Image color effects, grayscale, sepia, negative, red/green/blue adjustment Image special effects. Annotation, drop shadow, framing, bump map, sketch, oil painting, lens. Draw texts, lines, highlights, rectangles, ovals, and callout objects on images. Clone stamp and healing brush. Superior red-eye effect removal/reduction with a completely natural-looking end result. Multi-level undo/redo capability. One-touch best fit/actual size image display support. Image management, including tagging capability, with drag-and-drop and copy-to/move-to folder support. Histogram display with a color counter feature. Compare images side-by-side (up to 4 at a time) to easily cull those forgettable shots. Image EXIF metadata support.