RawTherapee!

(Official description) Create incredible photos anywhere with all-new Lightroom CC and 1 TB of cloud storage. Get powerful editing features on any device in a new, easy-to-use interface.

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. Now with the ability to batch export your photos, adding watermark, and using keyboard shortcuts, Polarr Photo Editor is also the most efficient photo editing tool available on Chrome.

Get ready to take your photos where no photo has gone before with Fotor.

Photivo is a multi platform photo processor for RAW and bitmap images with 16 bit precision. Photivo tries to give the user as much control as possible to express his creativity and to allow flexible adjustments for the various needs in photography.

LightZone is a digital photo editor software application. Its main purpose is to handle the workflow when handling images in various RAW formats.

Corel AfterShot Pro is fast, flexible digital photography workflow software that combines powerful photo management, advanced non-destructive editing and complete RAW processing.

UFRaw (which stands for Unidentified Flying Raw) is an application which can read and manipulate photographs in raw image formats, as created by many digital cameras. UFRaw is available both as a stand-alone utility and as a GIMP plugin.

Capture One Pro is a professional RAW converter offering you ultimate image quality with accurate colors and incredible detail from more than 300 high-end cameras – straight out of the box. It offers state-of-the-art tethered capture, powerful digital asset management, extensive adjustment tools and a flexible workflow.

ACDSee Photo Editor makes it easy to create the photos you’ve always envisioned. Apply stunning effects and filters, work with object layers effortlessly, quickly correct common photo flaws, and make advanced edits like a pro. With ACDSee Photo Editor, you have the power to transform any shot into your most extraordinary one yet.

PhotoDirector is CyberLink’s professional level photo workflow application, extending from award-winning video editing software, PowerDirector.

Fotoxx is a free open source Linux program for editing digital photos. The goal of fotoxx is to meet most photo editing needs while remaining easy to use. It can navigate images using a pageable thumbnail window. Change brightness and contrast, change color intensity, saturation, depth, make panoramas and HDR images, fix red-eyes, trim, rescale, rotate any angle, warp, fix perspective, sharpen, blur, remove noise. Edit within mouse-selected area. Import RAW files, edit 16 bits/color. Add tags to images, search by tags, dates, rating. »

Rawstudio is an open-source program to read and manipulate RAW images from most digital cameras. Rawstudio will convert your RAW files into JPEG, PNG or TIF images which you can then print or send to friends and clients.

ToolWiz Pretty Photo is a free powerful lightweight image editor. With just few clicks on this free tool, you can edit photos, create photo collage, and make them look the way you want them to be, and much prettier. Yes, it is that simple. ToolWiz Pretty Photo does not only come with 100+ professional image (art) filters and thousands of objects, but also supports frequently used functions, such as Resize, Flip, Crop, Rotate, Layers, Shadow, Frame and so on. Recently, it also made photo collage easier. With 97 collage patterns for your selection and DIY pattern designer, photo collage is never this simple before! »

Canon's Digital Photo Professional (DPP) is a powerful, free software application designed for editing, organizing, and processing Canon RAW files. This software is easily integrated into an existing workflow with other editing programs, such as Adobe Photoshop .