Aperture is described as 'photo editing and management computer program developed by Apple Inc. for the OS X operating system' and is an app in the Photos & Graphics category. There are more than 25 alternatives to Aperture for a variety of platforms, including Windows, Mac, Linux, iPhone and iPad. The best alternative is digiKam, which is both free and Open Source. Other great apps like Aperture are darktable (Free, Open Source), Adobe Lightroom (Paid), RawTherapee (Free, Open Source) and Polarr (Freemium).
digiKam is an advanced digital photo management application which makes importing and organizing digital photos a "snap". The photos are organized in albums which can be sorted chronologically, by folder layout or by custom collections.
darktable is a virtual lighttable and darkroom for photographers: it manages your digital negatives in a database and lets you view them through a zoomable lighttable. it also enables you to develop raw images and enhance them.
From high-precision light and color tools, to advanced clarity and dehaze settings, to the ability to create and save your own filters. Polarr is the ideal photo editor for bloggers, students, and photo professionals alike.
ACDSee is a complex, multi-purpose application that serves for viewing, organizing and editing digital photos. Furthermore, images can be shared on social websites or your own space on the developer’s website.
gThumb is an image viewer and browser for the GNOME Desktop. Features Image Viewer * View single images (including GIF animations). Supported image types are: BMP, JPEG, GIF, PNG, TIFF, ICO, XPM. * View EXIF data attached to JPEG images.
Adobe Photoshop Elements combines power and simplicity so you can make ordinary photos extraordinary; tell engaging stories in beautiful, personalized creations for print and the web; and easily find and view all your photos.